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Electric Mail Trucks | Earth Wise

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The US Postal Service recently announced that it plans to buy at least 66,000 electric vehicles by 2028.  With more than 231,000 total vehicles, the Postal Services operates one of the largest civilian vehicle fleets in the world.

Last February, the Postal Service announced a plan to replace up to 165,000 older mail trucks, many of which are as much as 30 years old.  The gas-powered trucks get an estimated 8.6 miles per gallon when air conditioning is running.  The plan was for only 10% of the new trucks to be electric, citing the high upfront costs of electric vehicles even though they generally make up the difference by saving on fuel and maintenance costs over time. 

Facing strong criticism from the Biden administration, the Postal Service shifted course and in July announced that 40% of the new trucks would be electric. With passage of the Inflation Reduction Act in August, the Postal Service received $3 billion for fleet electrification and has once again changed its plans.  It also announced that it intends to stop buying gas-powered delivery trucks altogether after 2026.

As part of the new plan, the Postal Service plans to upgrade hundreds of facilities across the country to accommodate electric vehicles.  This will include installing chargers and streamlining delivery operations to reduce unnecessary trips.

The Postal Service is no alone in working to clean up its fleets.  FedEx says it plans to completely electrify its pickup and delivery fleet by 2040.  Amazon has ordered 100,000 electric vans from the start-up company Rivian.

Electrifying the postal delivery system makes abundant sense.  Postal routes are predictable and there is ample charging time to meet the power needs of the fleet.

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Your Mail Truck Is Going Electric

Photo, posted January 18, 2017, courtesy of Rusty Clark via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Wildfire Smoke And Air Quality | Earth Wise

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According to a new study published by Stanford University, the average number of people in the U.S. exposed to unhealthy levels of airborne particulates at least one day a year has increased 27-fold over the last decade as a result of wildfires.

Millions of Americans are now routinely exposed to plumes of wildfire smoke that sometimes travel thousands of miles across the country.  Accumulations of deeply unhealthy air have emerged mainly in the West, where increasingly intense wildfires have become all too common.  Six of the seven largest wildfires in California recorded history have occurred since 2020.

Wildfire smoke has resulted in school closures, flight postponements, and even cancelled concerts.  Overall, the regression in air quality has undone much of the clean air progress that has taken place since the advent of the Clean Air Act in 1970.

Wildfire smoke has added about 5 micrograms of PM 2.5 particles per cubic meter of air on average in many places in the West.  This is a substantial increase from national levels, which are a total of about 10 micrograms per cubic meter and mostly result from emissions from cars, trucks, and power plants.

A decade ago, fewer than 500,000 Americans were exposed to any days of an air quality index of 100 or more due to smoke, which is a level that is deemed unhealthy.  In 2020, 25 million Americans were in areas with such levels at least one day during the year.

Ordinarily, if people don’t live near a highway or power plant, their air quality is likely to be pretty good.  But incursion from wildfire smoke is changing that, and the trend is likely to increase.

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Number of Americans Exposed to Harmful Wildfire Smoke Has Increased 27-Fold

Photo, posted August 19, 2013, courtesy of Mike Lewelling / National Park Service via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Electrifying Delivery Vehicles | Earth Wise

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Most of the buzz about electric vehicles relates to passenger cars as the auto industry is making a major transition away from gasoline power.  Recently, pickup trucks have started to get some attention as well as Ford’s electric version of the F-150 truck has hit the streets and the long-awaited Tesla Cybertruck will be introduced next year.  There hasn’t been as much talk about delivery vehicles, but there should be.

There are about 15 million delivery vehicles in the U.S., and they are a significant contributor to greenhouse gas emissions.   The post office alone has a quarter million of them.  Such vehicles are especially attractive candidates for electrification.  Most travel relatively consistent and short routes, which makes it easier for companies to be able to charge them and keep them charged.

Electrifying delivery vehicles in cities is especially important because the vehicles travel into and through residential neighborhoods, spreading pollution and particulates as they go.

Some provisions of the Inflation Reduction Act provide credits for the purchase of commercial vehicles.  Light-duty vans and trucks qualify for a credit of as much as $7,500.  Medium- and heavy-duty trucks qualify for credits as high as $40,000.  In addition, substantial tax credits are available for the installation of charging equipment.

According to a study by the Rocky Mountain Institute, sixty percent of new truck sales could be electric by 2030.  By 2035, the trucking industry could cut its emissions in half.

American companies are already stepping up to the plate.  Amazon plans to deploy 100,000 electric delivery vehicles from new automaker Rivian.  Walmart, UPS, FedEx, and others have also committed to electrified trucks.

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The Climate Bill Will Electrify More Delivery Vans and Trucks

Photo, posted August 1, 2021, courtesy of Ivan Radic via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

A Boom In Auto Battery Manufacturing | Earth Wise

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Nearly all automobile manufacturers are in a global race to build electric cars and trucks.  There is a rapidly growing need for the battery packs that power those vehicles and therefore manufacturers are in a race to build battery factories to address that need.

The latest battery plant announcement comes from Stellantis – the new company created in 2021 through the merger of Fiat Chrysler and Peugeot.  Stellantis aims to sell five million electric cars by 2030, which means they will need a lot of batteries.  They will be spending $2.5 billion in partnership with Samsung to build a battery factory in Kokomo, Indiana.  The facility is expected to create 1,400 jobs.  Stellantis already had announced that it would build a battery factory in Windsor, Ontario in partnership with LG Energy Solutions. 

They are not alone in their aggressive efforts on electric vehicle battery development.  Ford Motor is building two battery plants in Kentucky and a third one in Tennessee.   Ford has recently started production of its F-150 electric pickup truck which has attracted large numbers of pre-orders.  The gas-powered Ford F-150 has been the best-selling vehicle in America for years.

General Motors is opening a new battery production plant in Ohio this summer and has two others under construction in Tennessee and Michigan.   Hyundai plans to spend $5.5 billion on an electric vehicle and battery manufacturing facility near Savannah, Georgia that is expected to begin operations in 2025.

The auto industry has been struggling in recent times, but there is clearly a massive boom underway as the industry makes the transition from internal combustion engines to battery electric power.

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Stellantis and Samsung to spend $2.5 billion on an electric vehicle battery plant in Indiana

Photo, posted July 29, 2017, courtesy of Steve Jurvetson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Electric Cars On The Rise | Earth Wise           

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The first quarter of the year was a tough one for the U.S. auto industry.  Overall sales of cars and trucks were down 15.7% compared with last year.   Automakers have been dealing with shortages of computer chips and other supplies, resulting in slowdowns in production.

The one major exception to the trend has been sales of electric cars.  In the first quarter, U.S. electric vehicle sales were up 76% compared with last year.  This was enough to double EV’s market share to 5.2%, up from 2.5% last year.

Reaching a five percent market share is a significant indicator that electric vehicles are becoming mainstream.  According to many industry analysts, this is just the beginning of a major ramp-up in EV sales.

The strong results in the first quarter were largely driven by one company – namely, Tesla.  Tesla has been expanding rapidly and has been proactive and creative in avoiding delays due to parts shortages.  Tesla’s best-selling car is now the Model Y, which is an SUV implementation of its Model 3 design.  Overall, the company is now producing cars at a rate of more than 1 million per year and has recently opened new manufacturing plants in Texas and in Germany.

But Tesla is not the only story in the world of electric vehicles.  Mass production is beginning for Ford’s F-150 Lightning truck. 

Nissan, Hyundai and Kia have electric cars on the market and shortly near-twin electric models jointly developed by Subaru and Toyota will be available as well.

The electrification of vehicles is an essential step in reducing greenhouse gas emissions.  With gasoline at painfully high prices, electric cars are more attractive than ever.

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Inside Clean Energy: US Electric Vehicle Sales Soared in First Quarter, while Overall Auto Sales Slid

Photo, posted October 13, 2017, courtesy of Rob Bertholf via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Electric Pickup Trucks | Earth Wise

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There are more and more electric cars on the market as auto manufacturers move toward fleet-wide electrification.  In the United States, pickup trucks are massively popular.  The top three selling vehicles in the country are all trucks, led by the Ford F-Series.  Thus, it is no surprise that automakers are now turning their attention to electric pickup trucks.

Some of the trucks are from established manufacturers like Ford and Chevy and others from new companies like Rivian.  The Ford F-150 Lightning is bound to be a big seller.  There are hundreds of thousands of pre-orders for Tesla’s exotic Cybertruck, now expected to enter the market next year.

A recent study looked at the environmental impact of pickup truck electrification.  The central question is what does the transition to electric trucks mean for the overall decarbonization of the transportation industry?

Researchers from the University of Michigan and the Ford Motor Company conducted a cradle-to-grave assessment of the life cycle of pickup trucks and compared the implications of truck electrification to those of sedans and SUVs.

The study found that replacing an internal combustion-powered vehicle with a battery-powered vehicle results in greater total greenhouse gas emission reductions as the size of the vehicle increases, which is no real surprise considering how much more gas larger vehicles use.

The study also found that manufacturing electric vehicles produces more emissions than gas-powered vehicles, but the impact is offset by savings in their operation.  Breakeven time is little more than a year.

Basically, the results are that replacing gas-powered trucks with electric trucks is even a bigger win for the planet than replacing gas cars with electric cars.  Let’s hope we see plenty of electric trucks on the roads in the near future.

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Study: Greater greenhouse gas reductions for pickup truck electrification than for other light-duty vehicles

Photo, posted September 22, 2020, courtesy of Steve Jurvetson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Electrifying The Federal Fleet | Earth Wise

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The federal government owns and operates about 645,000 vehicles.  Among them are about 200,000 passenger vehicles, 78,000 heavy-duty trucks, 47,000 vans, 847 ambulances, and three limousines.   About 225,000 vehicles are operated by the Postal Service.  

Each year, these vehicles are driven about 4.5 billion miles and use about 400 million gallons of gasoline, producing 3.5 million tons of greenhouse gases.

President Biden signed an executive order in January directing federal officials to devise a plan for converting the entire fleet to clean and zero-emission vehicles.  So far, the work has been slow. 

According to a new report from Atlas Public Policy, accelerating the push for electric vehicles in the federal fleet could save taxpayers billions of dollars.

Electric vehicles have lower fueling and maintenance costs as well as a smaller environmental impact.  According to the report, the government could replace 40% of its light-duty vehicles and buses not owned by the Postal Service with cheaper plug-in alternatives by 2025.  By 2030, it could replace 97% of such vehicles with EVs for a lifetime savings of more than $1 billion.  Furthermore, by 2025, it would be possible to replace nearly all mail trucks with EVs for a savings of $2.9 billion.

The federal fleet represents an opportunity to encourage transportation electrification to happen much more quickly.  Apart from the economic and environmental benefits, having an electrified federal fleet would increase public awareness of the practicality and benefits of electric vehicles.

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Push to Electrify Federal Fleet Could Yield Billions in Savings by 2030

Photo, posted May 14, 2015, courtesy of Tony Webster via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Spending Habits And Carbon Emissions | Earth Wise

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According to a new Swedish study recently published in the Journal of Industrial Ecology, men spend their money on greenhouse gas-emitting goods and services, such as meat and fuel, at a much higher rate than women. 

The study looked at the carbon emissions created by consumption among categories like food, clothing, furniture, and vacations to see if households could reduce their greenhouse gas emissions by buying different products and services.  The research team reviewed Swedish government data through 2012 and analyzed the spending habits of households, single men, and single women. 

According to the study, single Swedish men spent about 2% more money overall than single Swedish women.  But the stuff that the men bought created 16% more greenhouse gases than the stuff that the women bought.  That’s because men were more likely to spend money on high-emitting categories, like fuel for cars, while women spent more on less-emitting categories like furniture, health care, and clothing. 

For both men and women, vacations were a major source of emissions, accounting for approximately one-third of their total carbon footprint. 

While the carbon impact of men’s and women’s diets were nearly equal, men spent more money on meat while women spent more on dairy.  Both meat and dairy production are major sources of global greenhouse gas emissions.   

The study found single people were responsible for more greenhouse gas emissions than married people or people in households. 

According to the research team, people could decrease their carbon emissions nearly 40% by making more environmentally-friendly choices, including switching to plant-based foods and traveling by train as opposed to flying or driving when possible. 

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Men have a bigger carbon footprint than women, climate study finds

Photo, posted June 17, 2012, courtesy of Stephen Ausmus/USDA via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Is Peak Oil Here? | Earth Wise

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For many years there has been talk of “peak oil”, the point at which rising world oil consumption would peak and then start declining.  Some analysts have been predicting that this could happen by the 2030s.   But the coronavirus pandemic drove a 9% slump in oil demand in 2020 that some economists are saying might never be entirely reversed.

There are three major forces driving down the world’s appetite for oil:  decarbonization of economies to meet the goals of the Paris climate agreement, declining demand for oil as renewable energy sources and electric vehicles are increasingly adopted, and detoxification as cities act to curb particulates and emissions from burning petroleum.

The largest single factor is electric vehicles.  Automobiles currently consume almost half of the world’s oil.  As of the end of 2020, there were an estimated 10 million electric cars as well as more than 600,000 electric buses and trucks.  This is still less than 1% of all vehicles, but 5% of all new cars being bought are now electric and the number is growing rapidly.  Experts estimate that nearly a quarter of global car sales will be electric vehicles by 2025 and many car manufacturers are promising to sell only electric cars within the next 10 years.

The decline in oil demand is pretty much inevitable at this point.  The main question is how quickly it will happen.  Road transport makes up 48% of global oil demand, petrochemicals account for 14%, aviation 7%, and shipping 6%.  Ultimately all these things are likely to diminish over time. 

Only time will tell, but the long-awaited arrival of peak oil may already have happened.

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Amid Troubles for Fossil Fuels, Has the Era of ‘Peak Oil’ Arrived?

Photo, posted April 14, 2019, courtesy of Tony Webster via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Have We Reached Peak Internal Combustion Engine? | Earth Wise

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According to new analysis from Bloomberg New Energy Finance, global sales of gas-powered cars may well have peaked in 2017, representing a significant milestone in the transition to electric vehicles.

Demand for gas cars dropped in 2018 and 2019, and then plummeted in 2020 as a result of the coronavirus pandemic.  While sales are surely picking up as the pandemic ebbs, the increasing demand (and supply as well) for plug-in vehicles is likely to put gas-powered cars in a state of permanent decline.

Global EV sales are projected to go from 3.1 million last year to 14 million in 2025.  The growth is being driven by falling battery prices, government policies, and increasing choices of vehicles.  Virtually all automobile manufacturers are introducing electric vehicles over the next couple of years and increasing numbers of them are planning a complete transition to EVs in the near future.  Projections are that EVs will account for the majority of new car sales by 2035.

While all this progress is encouraging, there are still over a billion gas- and diesel-powered cars on the road and the fleet turns over slowly.  The current average operating life of cars here in the US is 12 years.

To reach the net-zero carbon emission goals by 2050 as many governments have mandated, additional policies and regulations will be needed.  For example, electric cars will need to account for essentially all new sales by 2035, not just the majority.  Reaching net-zero by mid-century will require all hands on deck, including trucks and heavy commercial vehicles that have barely started to become electrified.

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New Analysis Suggests We Have Already Hit Peak Internal Combustion Engine

Photo, posted December 23, 2017, courtesy of Davide Gambino via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The Path To Net Zero | Earth Wise

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Reaching net zero emissions is both feasible and affordable, according to researchers at the Department of Energy’s Lawrence Berkeley National Laboratory, the University of San Francisco, and consulting firm Evolved Energy Research.   The researchers created a detailed model of the entire U.S. energy and industrial system to produce the first detailed, peer-reviewed study of how to achieve carbon neutrality by 2050.

The study analyzed multiple feasible technology pathways based on very different assumptions of remaining fossil fuel use, land use, consumer adoption, nuclear energy, and biofuel use.  What they had in common was increasing energy efficiency, transitioning to electric technologies, utilizing clean electricity (especially wind and solar power), and deploying small amounts of carbon capture technology.

The decarbonization of the U.S. energy system is an infrastructure transformation.  Getting to net zero by 2050 means adding many gigawatts of wind and solar power plants, new transmission lines, a fleet of electric cars and light trucks, millions of heat pumps to replace conventional furnaces and water heaters, and more energy-efficient buildings.

The various pathways studied have net costs between 0.2% and 1.2% of GDP, which is as little as $1 per person per day.  The cost variations come from various tradeoffs such as the amount of land given to solar and wind farms as well as the amount of new transmission infrastructure required. 

A key result of the study is that the actions required over the next 10 years are similar among all the pathways.   We need to increase the use of renewable energy and make sure that all new infrastructure, such as cars and buildings are low carbon.

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Getting to Net Zero – and Even Net Negative – is Surprisingly Feasible, and Affordable

Photo, posted July 12, 2010, courtesy of Tom Shockey via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Policy Moves on Electric Cars | Earth Wise

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In recent times, there have been several significant events affecting the transition to electric vehicles.  The new administration has made aggressive moves toward fighting climate change.  Wall Street investors have placed more value on Tesla stock than that of GM, Toyota, Volkswagen, and Ford combined.  China, the world’s largest car market, recently mandated that most new cars must be powered by electricity within 15 years.

Against this background, the CEO of General Motors announced in late January that the company will aim to sell only zero-emission cars and trucks by 2035.

This announcement took the rest of the auto industry by surprise.  In the past, the industry tended to present a united message on emissions and other policy issues.  This time around, GM has stepped out in front of the issue.

GM has already committed to spending $27 billion to introduce 30 electric vehicle models by 2025 and is building a plant in Ohio to make batteries for those cars and trucks.

A key driver in the GM decision, no doubt, was an executive order signed by President Biden on his first day of office.  The order directed the Environmental Protection Agency to immediately begin developing tough new tailpipe pollution regulations, designed to reduce the nation’s largest source of greenhouse gas emissions.

Even before the change in administration, five other major automakers – BMW, Ford, Honda, Volkswagen, and Volvo – had already legally bound themselves to tougher fuel economy standards in a deal with California.  Those companies committed to an average fuel economy of 51 miles per gallon in 2026.

While no other large automaker has set a specific target date for selling only electric vehicles, many of them are moving in that direction.  The rapid growth of Tesla is an indicator of where the auto industry is heading.

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G.M. Announcement Shakes Up U.S. Automakers’ Transition to Electric Cars

Photo, posted July 29, 2017, courtesy of Steve Jurvetson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Hydrogen-Powered Transport In Britain | Earth Wise

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The first hydrogen-powered train in the UK had its first mainline runs at the end of September.  The train, known as HydroFLEX, was developed under a project headed by the University of Birmingham under the UK government’s Department for Transport. 

Hydrogen-powered trains do not emit harmful gases but rather use hydrogen and oxygen to produce electricity, water, and heat.  The technology in the HydroFLEX train will be available by 2023 to retrofit existing diesel-powered trains and thereby de-carbonize the rail network and make train travel greener and more efficient.

The UK has ambitious plans for the use of hydrogen technology.  The Department of Transport plans to publish a master plan in January that will outline how green hydrogen could power buses, trucks, rail, maritime, and aviation transport across the UK.

The HydroFLEX trial is taking place in Tees Valley in northeastern England and the plan is for that area to become a Hydrogen Transport Hub that will include the world’s largest versatile hydrogen refueling facility.   The plans for Tees Valley involve academia, industry, and government participants.  The next stages of the HydroFLEX project are well underway with the University of Birmingham developing a hydrogen and battery-powered module that can be fitted underneath a train to allow for more space for passengers in train cars.

The UK government’s Hydrogen for Transport Program is also funding a green hydrogen refueling station and 19 hydrogen-powered garbage trucks in Glasgow, Scotland.

The UK plans to switch to a net zero economy and their current program increasingly embraces hydrogen technology to provide more sustainable, greener forms of transportation.

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UK embraces hydrogen-fueled future as transport hub and train announced

Photo, posted May 15, 2019, courtesy of Jeremy Segrott via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The Earth Itself Is Quieter | Earth Wise

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Our stories often discuss how human activities change the natural environment.  With most of us confined to our homes, the lack of human activities is having profound effects on the environment.  We are talking about some of these this week.

With about a third of the world’s population sheltering in place, our planet is much quieter these days.  It isn’t just our machines, vehicles, and factories that are making less noise.  The earth itself is quieter.  There has been a reduction in the earth’s seismic vibrations.

According to the journal Nature, various human-powered movements contribute to the persistent vibration of the earth’s crust.  Things like engines firing up in factories, trains pulling into stations, and trucks barreling down highways all make contributions to seismic activity.  Taken individually, such things are insignificant, but taken together, they produce a background of seismic noise that makes it difficult for seismologists to detect natural signals such as volcanic activity and earthquake aftershocks.

With much human activity on pause during the coronavirus outbreak, seismologists across the globe are seeing significant reductions in background seismic noise levels.

This respite in seismic noise, for as long as it lasts, represents an opportunity for scientists to better study the natural activity in the earth’s crust. Researchers studying the impact of ocean waves to predict volcanic activity and those who triangulate the location of earthquake epicenters may be able to make more sensitive measurements than under normal conditions.

There are very few positive things one can say about the coronavirus crisis, but it is providing opportunities to study and observe aspects of the natural world that are ordinarily drowned out by the bustle of humanity.

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Coronavirus lockdowns across the globe are actually causing the Earth to move less

Photo, posted March 9, 2020, courtesy of Jeremy Segrottvia Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Shutting Down Pollution | Earth Wise

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With much of the country shut down as the coronavirus forces people to stay at home, there has naturally been a drastic reduction of traffic on roads and highways.   And with that decrease, there has been a dramatic reduction in pollution as well.

A satellite that detects emissions in the atmosphere linked to cars and trucks has observed huge declines in pollution in major metropolitan areas such as Los Angeles, Seattle, New York, Chicago, and Atlanta.

Los Angeles is infamous for its rush-hour traffic but that has pretty much ceased to exist. Similar changes can be seen in the San Francisco Bay Area, where nearly 7 million residents have been ordered to shelter in place.  New York City is less dependent on car travel than in other metro areas, but the shutdown of office buildings, schools, and restaurants has nonetheless resulted in a substantial reduction of traffic on the streets of the city.

While this sudden decline in air pollution over U.S. cities has some near-term health benefits, those benefits are likely to be fairly minor in the big picture.  When the coronavirus outbreak subsides and people are allowed to leave their homes and go back to their normal lives, air pollution will most certainly rebound to previous levels.  In any event, studies have shown that long-term exposure to air pollution has a larger impact on public health than any transient events.

Having much cleaner air for a while is certainly a good thing, but this shutdown is not a sustainable way to reduce air pollution and the long-term effects of the coronavirus crisis will certainly not be positive.

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Traffic and Pollution Plummet as U.S. Cities Shut Down for Coronavirus

Photo, posted March 15, 2020, courtesy of Tom Collins via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Lighting Up Batteries

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One of the things that hampers the adoption of electric vehicles is range anxiety.  Drivers worry that they will run out of charge before they get to the closest charging station.   Range anxiety has lessened considerably in recent years as electric cars have incorporated larger and larger battery packs yielding driving ranges well over two hundred and even over three hundred miles.

With these extended driving ranges, drivers then turn their attention to how long it takes to charge.  Tesla’s Superchargers have gotten to the point where a car can add 75 miles of charge in 5 minutes and 200 miles in less than half an hour.  Fast charging systems are improving the charge times for other electric models as well.

Nevertheless, drivers would ideally like to reduce charging times to as little as possible in order to provide the convenience experienced in gasoline cars.

Researchers at Argonne National Laboratory have reported a mechanism for speeding up the charging of lithium-ion batteries for electric vehicles.  By exposing the battery cathode to a beam of concentrated light, the charging time can be reduced by a factor of two or more. If this could be commercialized, it could be a real game changer for electric vehicles.

The research used specially crafted lithium-ion cells with transparent quartz windows.  Shining white light into the windows caused a semiconductor material known as LMO to change its charge state and drive the charging reaction more quickly in the lithium ions of the battery.

Using this photo-assisted technology in vehicle batteries would require substantial redesign that would allow concentrated light to illuminate battery electrodes during charging.  How practical that is remains to be seen, but the payoff would be substantial.

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Shedding new light on the charging of lithium-ion batteries

Photo, posted June 30, 2018, courtesy of Open Grid Scheduler via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Amazon And Climate Change

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Online shopping giant Amazon has unveiled a Climate Pledge, committing to meet the goals of the Paris climate agreement ten years ahead of schedule, and to be carbon neutral by 2040. This is the company’s most ambitious push yet to reduce its carbon footprint, which currently rivals that of a small country.  In fact, Amazon is responsible for 48.9 million tons of carbon dioxide last year, which is about 85% of what Switzerland typically emits in a year. 

Amazon, which ships more than 10 billion items a year on fossil fuel-intensive planes and trucks, has ordered a fleet of 100,000 electric vans that will start delivering packages to doorsteps in 2021.  The vans will be made by Rivian, a Michigan-based company that Amazon invested in earlier this year. 

Amazon plans to get 100% of its energy from solar and other renewable sources by 2030.  Currently, it gets about 40% of its energy from renewables. 

Amazon is also investing $100 million in nature-based climate solutions and reforestation projects around the world in order to remove carbon from the atmosphere. 

While announcing these initiatives recently at the National Press Club in Washington, D.C., Amazon CEO Jeff Bezos said the company needs to be a leader on the climate change issue:

We want to say look, if a company of Amazon’s complexity, scale, scope, physical infrastructure, delivering 10 billion items can do this, so can you.

After revealing Amazon’s Climate Pledge, Bezos said he would talk with CEOs of other large companies to try to get them to also sign it.  You can find a link to Amazon’s progress on its commitments by visiting this website.

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‘Middle of the herd’ no more: Amazon tackles climate change

Amazon: Committed to a sustainable future (track progress here)

Photo courtesy of Amazon.

Earth Wise is a production of WAMC Northeast Public Radio.

Renewable Natural Gas

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Small-scale biogas systems have collected methane from landfills, sewage plants, and farms for decades.  Here in the US, biogas is finally catching up with modern techniques with the advent of third-party operators introducing more sophisticated technology to capture methane and pump it directly into pipelines.

Renewable methane or natural gas represents a significant mostly unexploited source of energy.  Examples include the vast amounts methane generated by manure from some of the 2,300 hog farms in eastern North Carolina, biodigesters that can turn clusters of large California dairy farms into energy hubs, as well as diverting food waste from landfills and transforming it into vehicle and heating fuels.

According to a 2014 EPA study, the U.S. could support at least 13,000 biogas facilities, fed by manure, landfill gas, and biosolids from sewage treatment plants.  Those facilities could produce over 650 billion cubic feet of biogas per year – enough renewable energy to power 3 million homes.

A study by the World Resources Institute estimated that the 50 million tons of organic waste sent to landfills or incinerated every year in the U.S. has the energy content of 6 billion gallons of diesel fuel, amounting to 15% of all diesel consumed by heavy-duty trucks and buses.

Utilizing all that biogas could help lower greenhouse gas emissions from some of the most difficult sectors to decarbonize – transportation, industry, and heating buildings.  In addition, ramped up renewable gas could keep organic waste out of landfills and prevent manure runoff into rivers and water supplies.

Renewable natural gas could be the next big thing in green energy.

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Could Renewable Natural Gas Be the Next Big Thing in Green Energy?

Photo, posted June 19, 2013, courtesy of Alan Levine via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Floating Solar Fuel Farms

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Limiting global warming will require a massive reduction in CO2 emissions from fossil fuel burning.  Renewable energy sources are playing a growing role in the power grid and electric cars are becoming increasingly popular.  Despite all this, carbon-based liquid fuels will continue to dominate our energy use for the foreseeable future.

Researchers in Norway and Switzerland have described a potential scheme that would help remove CO2 from the atmosphere and produce a valuable liquid fuel.

The idea is to create floating islands containing large numbers of solar panels that convert carbon dioxide in seawater into methanol, which can fuel airplanes and trucks.

A combination of largely existing technologies would be the basis of these floating islands, which would be similar to present-day floating fish farms.  The researchers envision clusters each composed of 70 circular solar panels that in total cover an area of roughly half a square mile.  The solar panels would produce electricity, which would split water molecules and isolate hydrogen.  The hydrogen would then react with carbon dioxide pulled from seawater to produce usable methanol.

The technology already exists to build the floating methanol islands on a large scale in areas of the ocean free from large waves and extreme weather.  Suitable locations are off the coasts of South America, North Australia, the Arabian Gulf, and Southeast Asia.

A single floating solar farm could produce more than 15,000 tons of methanol a year – enough to fuel a Boeing 737 airliner for more than 300 round-trip flights across the country.  Floating energy islands would not be a magic bullet for limiting the effects of climate change, but they could well be an important part of an overall strategy.

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Giant Floating Solar Farms Could Make Fuel and Help Solve the Climate Crisis, Says Study

Photo courtesy of PNAS.

Earth Wise is a production of WAMC Northeast Public Radio.

Falling U.S. Carbon Emissions

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Reducing carbon emissions is a goal embraced by nearly every country in the world, but actually accomplishing it isn’t easy. It is true that renewable energy sources are playing a growing role in energy systems, but counterbalancing that trend is growing energy demand, especially in developing countries.

Here in the US, energy-related CO2 emissions actually went up nearly 3% in 2018 compared with 2017.  But the US Energy Information Administration is now forecasting a 2% drop in emissions this year.

The main reason energy-related emissions are headed lower at this point is coal-fired power plant retirements.  More than 90% of the coal used in the US goes toward electric power and utilities are increasingly turning away from coal.

The rapid shift away from coal has mostly been due to the increasing use of natural gas.  Natural gas is not actually a clean and green fuel, but it is definitely less carbon-intensive than coal.  Overall, the total installed capacity of renewable sources – hydropower, wind, solar, geothermal, and biomass – has now actually surpassed the capacity of coal plants.  Given that renewables have in many places become the cheapest power option, there is little chance that coal has much of a future, despite efforts by the current administration.

The electric power sector is gradually moving away from all carbon-emitting sources – a trend that is being reinforced by legislation in many states.  The real CO2 emissions leader is petroleum, which accounts for nearly half of the total.  We have a long way to go to reduce emissions from the use of petroleum.  There are over 250 million cars and trucks on US roads and only a little over a million of them don’t burn fossil fuels.

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US energy-related CO2 emissions expected to fall this year, almost solely due to a drop in coal use

Photo, posted November 6, 2017, courtesy of Cindy Shebley via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

WAMC Northeast Public Radio

WAMC/Northeast Public Radio is a regional public radio network serving parts of seven northeastern states (more...)