transition

Electric Cars And Cleaner Air | Earth Wise

January 20, 2023 By EarthWise Leave a Comment

Cities are awash in microscopic soot and other pollutants from the tailpipes of vehicles. Apart from contributing substantially to the warming of the planet, these emissions have a significant impact on human health. Research at Cornell University has determined that the continued growth of electric cars will lead to cleaner air and reduced human mortality in most if not all U.S. metropolitan areas.

The study, published in Renewable and Sustainable Energy Reviews, estimated the health impact and consequential economic impact of cleaner air in American cities as a result of the transition to electric vehicles.

For example, by 2050, Los Angeles will have 1,163 fewer premature deaths annually, corresponding to $12.6 billion in economic health benefits. Greater New York City could see 574 fewer deaths a year leading to $6.24 billion in associated economic gains.

Global sales of electric cars have grown steadily. In 2016, they accounted for less than 1% of the market. That share grew to 2.2% in 2018, 4.1% in 2020, and 6.6% in 2021.

In the U.S., electric cars accounted for 4.5% of sales in 2021, but in many cities, the numbers were much higher.

These trends are likely to accelerate as a combination of government policies and major decisions by automakers drive a rapid transition to electrification. While mitigating the effects of climate change continues to be the main driving force for that transition, the human health benefits will be a very significant reward for doing the right thing for the planet.

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Electric car sales drive toward cleaner air, less mortality

Photo, posted May 11, 2021, courtesy of Chris Yarzab via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

The Clean Energy Transition Is Accelerating | Earth Wise

December 2, 2022 By EarthWise Leave a Comment

The world’s economies including its energy markets have been in turmoil in recent times but despite the chaotic conditions, the shift to clean energy is gaining momentum. This year, for the first time, the world is investing more in wind and solar power than in oil and gas drilling. Investments in renewables are expected to reach $494 billion this year, more than the $446 billion directed towards oil and gas extraction. It is rather sobering to realize that the world is still spending nearly half a trillion dollars a year to dig up more oil and gas.

According to the International Energy Agency, there will be an estimated 340 gigawatts of new renewable power capacity installed in 2022. This is roughly equal to the total installed power capacity of Japan, which has the world’s third-largest economy. This year is also seeing tremendous growth in electric cars, which are projected to make up 13% of all light-duty vehicle sales across the globe.

According to analysis by Bloomberg Green, 87 countries are now getting at least 5% of their power from wind and solar. This number is considered to be a critical tipping point at which emerging technologies become more widely adopted. The United States reached that 5% threshold in 2011. Last year, our country surpassed 20% solar and wind power. If we follow trends set by pioneering countries like Denmark, Ireland, and others, wind and solar will supply at least half of our power within the next decade.

Despite the turbulence in global energy markets, the shift to clean power is ongoing. Estimates are that global spending on renewables will double over the next 10 years.

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Despite Turmoil in Energy Markets, the Shift to Clean Energy Is Gaining Steam

Photo, posted June 12, 2013, courtesy of Activ Solar via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Carbon Capture Booming | Earth Wise

November 24, 2022 By EarthWise Leave a Comment

For the world to reach a state of net-zero emissions, it is going to require more than the ongoing transition to renewable energy sources. There will also need to be efforts to capture the emissions from sources that can’t easily eliminate their pollution. These include steel mills, cement plants, and other industrial sites. At least for the foreseeable future, a number of essential industries have no other viable path to deep decarbonization, and carbon capture and storage projects are the only promising strategy on hand.

Companies use CCS to filter emissions from fossil fuel power plants and industrial facilities and then bury the captured carbon underground, often in deep caverns.

Over the past 12 months, the pipeline for carbon capture and storage projects has grown by 44%. This year, firms have announced 61 new CCS projects, bringing the total number of commercial projects in the global pipeline to 196, which includes about 30 that are already in operation. Another 11 are under construction, and 153 are in development.

When all of these projects are completed, they will have the capacity to capture a total of about 270 million tons of carbon dioxide per year. Estimates are that there need to be 1,400 million tons locked away each year to reach zero-emissions. So, the existing project pipeline constitutes about 20% of what is ultimately needed.

The recently passed Inflation Reduction Act boosts tax incentives for carbon capture. Analysts believe this could multiply U.S. deployment of the technology more than 10-fold. Globally, it is expected that CCS will continue its rapid growth as countries ramp up investments in the technology.

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Carbon Capture Projects See Meteoric Growth in 2022

Photo, posted August 22, 2022, courtesy of Nenad Stojkovic via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio

Decarbonizing Could Save Trillions | Earth Wise

October 18, 2022 By EarthWise Leave a Comment

Scientists have long been calling for a transition to clean energy to prevent catastrophic impacts of climate change. For much of that time, many people and, specifically, many of those in power, were skeptical of the need to do something about the warming climate. But even as the facts about the changing climate became increasingly undeniable, there continued to be fears that the transition to clean energy sources would be unacceptably expensive and harmful to the economy.

A recent study published by Oxford University shows that the opposite is true: a concerted effort to convert to green energy technologies such as solar, wind, and batteries, will save the world enormous amounts of money.

The Oxford study shows that a transition to nearly 100% clean energy by 2050 results in a lower-cost energy system that provides energy access to more people around the world. The energy transition is expected to save the world at least $12 trillion compared to continuing our current levels of fossil fuel use.

The cost of renewable energy sources has been going down for decades and they are already cheaper than fossil fuels in many situations. It is expected that they will become cheaper than fossil fuels across almost all applications over time. Accelerating the transition will allow renewables to become cheaper faster.

The study made use of probabilistic models to estimate the costs of various possible future energy systems based on past data. Even the most pessimistic models showed that scaling up green technologies is likely to drive their costs down so far that they will generate net cost savings and that the faster the transition goes, the more will be saved. The result will be a cleaner, cheaper, more energy secure future.

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Decarbonising the energy system by 2050 could save trillions

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

Earth Wise is a production of WAMC Northeast Public Radio

Electrifying Delivery Vehicles | Earth Wise

October 12, 2022 By EarthWise Leave a Comment

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

Lithium Mining And The Environment | Earth Wise

August 22, 2022 By EarthWise Leave a Comment

The Salar de Atacama in Chile is a large, dry salt flat surrounded by mountain ranges and is one of the driest places on Earth. Parts of the Atacama Desert have gone without rain for as long as people have been keeping track. Water rich in dissolved salts lies beneath this flat surface and it is particularly rich in lithium salts. Forty percent of the world’s known lithium deposits are the in the Salar.

Lithium is the key component of the batteries that power electric cars as well as cell phones and computers. It is an essential part of the transition away from fossil fuels and towards green energy. But it is important that this element is obtained responsibly with minimal damage to the environment.

Lithium, the lightest of the metals, tends to occur in layers of volcanic ash, but reacts quickly with water. It leaches into groundwater and settles in flat basins where it remains in a briny solution. This dense brine often ends up beneath pockets of fresh surface water, which are havens for fragile ecosystems.

A new study by the University of Massachusetts Amherst looked at the hydrological impact of lithium mining in the Salar. The study found that the impact of lithium mining depends critically on how long surface water is in place. Much of the fresh water there is at least 60 years old. Both droughts and extreme rainfall can cause major changes to the surface water that ordinarily comes from mountain runoff. Lithium mining itself only accounts for less than 10% of freshwater usage in the Salar. But the state of the surface water needs to be carefully monitored to protect the ecosystems as the climate continues to change.

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How environmentally responsible is lithium brine mining? It depends on how old the water is

Photo, posted February 21, 2016, courtesy of Jorge Pacheco via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Carbon Capture: Solution Or Band-Aid? | Earth Wise

July 13, 2022 By EarthWise Leave a Comment

The idea of capturing the CO2 emissions from industry and locking them up is nothing new. It’s been going on for decades in some places. Norway’s state-owned oil company Equinor has been holing away a million tons of CO2 a year for a long time. But overall, CCS – carbon capture and storage – has had very limited use. As of last year, there were only about 30 large-scale projects in operation around the world, capturing only 0.1% of global emissions.

There is now growing interest in CCS and many new projects are underway. A combination of rising carbon prices in Europe, tax breaks for CCS in the US, national net-zero targets, and the increasing need to ramp down global emissions are all driving rising CCS activities.

While recent reports from the Intergovernmental Panel on Climate change still claim that it is possible to remain below 2 degrees Celsius of warming without using carbon capture, there is growing belief that it may be necessary given the present pace of the transition away from fossil fuels.

Two industries that together produce about 14% of global CO2 emissions are cement and steel. These are both industries for which it is difficult to eliminate emissions regardless of the energy sources used. CCS may be the best approach to reducing their emissions.

But there is considerable pushback against CCS. The concern is that CCS is primarily a way to delay decarbonization. It encourages various industries to continue to use fossil fuels instead of shifting away from them. Nonetheless, CCS no doubt has its place as part of the solution to climate change.

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Solution or Band-Aid? Carbon Capture Projects Are Moving Ahead

Photo, posted June 5, 2022, courtesy of Mark Dixon via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Avoiding Blackouts With Renewable Energy | Earth Wise

February 4, 2022 By EarthWise Leave a Comment

There are some people who worry that an electric grid heavily dependent upon intermittent sources like solar and wind power may be more susceptible to blackouts. According to a new study by Stanford University, these fears are misplaced.

The study, published in the journal Renewable Energy, found that an energy system running on wind, water, and solar, when combined with energy storage, avoids blackouts, and lowers energy requirements and consumer costs. In addition, implementing such a system would create millions of jobs, improve people’s health, and reduce land requirements.

The study focused on the stability in all U.S. grid regions as well as individual states based on the requirement that all electricity is provided by clean and renewable sources. No fossil fuel use, bioenergy, blue hydrogen, or even nuclear power were included in the modeling. Critics of such a shift in the energy system point to grid blackouts during extreme weather events in California in 2020 and Texas in 2021 as evidence that renewable sources can’t be trusted. But in both cases, renewable energy was not found to be any more vulnerable than other sources.

The study looked at the costs of the transition – which would be substantial – but found that it would pay for itself fairly quickly based on energy cost savings alone.

A significant finding of the study was that long-duration batteries were neither necessary nor helpful for grid stability. That stability could be obtained by linking together currently available short-duration batteries. Interconnecting larger and larger geographic regions would make the power system smoother and more reliable. Overall, intelligent management of the electric grid can result in a reliable and clean power system.

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Stanford researchers point the way to avoiding blackouts with clean, renewable energy

Photo, posted October 17, 2016, courtesy of B Sarangi via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Liquid Fuels From Carbon Dioxide | Earth Wise

January 5, 2022 By EarthWise Leave a Comment

Most of the world’s energy demands are still being met by burning fossil fuels, thereby releasing carbon dioxide into the atmosphere. The energy system is in the midst of a transition to renewable sources such as solar and wind power, but it will be quite some time before fossil fuels are only a minor part of energy production. To reduce global warming, it will be necessary to prevent the carbon dioxide from fossil fuels from entering the atmosphere by capturing it and either locking it away or making use of it.

Recent research at several Chinese universities has developed a novel electrocatalyst that efficiently converts CO₂ to liquid fuels containing multiple carbon atoms. The main products of the high-efficiency reaction are ethanol, acetone, and n-butanol. Previous electrocatalystic methods have mostly produced simpler hydrocarbons – namely, ones with only a single carbon atom. The fuels the new catalyst produces are much more useful.

The catalyst is made from thin ribbons of a copper/titanium alloy that are etched with hydrofluoric acid to remove the titanium from the surface. The process results in a material with a porous copper surface on an amorphous CuTi alloy. The substance exhibits remarkably high activity, selectivity, and stability for catalyzing the reactions leading to the production of the hydrocarbon fuels.

Converting carbon dioxide into liquid fuels would be advantageous because they have high energy density and are safe to store and transport. Apart from preventing carbon dioxide from entering the atmosphere, the process could also be a way to make use of excess energy produced by solar and wind generation by essentially storing that energy in the form of liquid fuels.

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Liquid Fuels from Carbon Dioxide

Photo courtesy of Angewandte Chemie via Wiley-VCH.

Earth Wise is a production of WAMC Northeast Public Radio.

Electric Cars Are Coming Sooner Than Expected | Earth Wise

September 30, 2021 By EarthWise Leave a Comment

It is widely believed that electrification is the future for vehicles. The only question is how long the transition will take. Predictions are all over the map, but the recent trend is to revise those predictions to say it will happen sooner than previously thought.

A recent report from the international accounting firm Ernst & Young predicts that EV sales in the US, China, and Europe will surpass those of fossil-fuel-powered vehicles five years sooner than previously expected. The report forecasts that fossil-fueled vehicles will represent less than 1% of global sales by 2045, taking their place among other historical but essentially abandoned technologies.

Europe is expected to be the leader in EV adoption. The forecast is that EVs will surpass legacy vehicles by 2028. China is expected to follow by 2033. The US is lagging behind, but even here, electrics are expected to achieve a majority of car sales by 2036.

Plug-in vehicle sales have surpassed a 10% market share in California and Tesla now has a 1.7% share of the total US car market. Norway is the global EV leader with 3 out of 4 car buyers choosing electrics. In that country, Tesla’s Model 3 is the top-selling vehicle of any kind. In Switzerland, 40% of car sales are EVs or hybrids.

There are many variables that will affect the timetable for the EV transition. Among them are the timetable for widespread use of autonomous vehicle technology, the effects of policy initiatives by governments around the world, the development of charging infrastructure, and the evolution of electricity generation and energy storage.

In any case, looking at the product roadmap for virtually every automobile manufacturer makes it clear that electric cars are the future.

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Ernst & Young: Electric Cars Are Coming Sooner Than Expected

Photo, posted April 25, 2021, courtesy of Rutger van der Maar via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Have We Reached Peak Internal Combustion Engine? | Earth Wise

August 3, 2021 By EarthWise 1 Comment

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.

Ever Cheaper Solar Power | Earth Wise

May 14, 2021 By EarthWise Leave a Comment

The price of electricity from solar panels has been dropping dramatically over the last decade. The average cost of utility-scale solar power has gone down more than 80% since 1980, making it the least expensive power source in many places. The plunging price of solar power is one of the driving forces behind the transition to clean energy.

The 2020 average cost of solar power was 4.6 cents per kilowatt-hour. The Department of Energy has recently set a target of reducing the cost of solar power by more than half again by 2030, to an unsubsidized average of 2 cents per kilowatt-hour. The 2-cent goal is not just the ordinary cost of electricity; it is the levelized cost of energy which is based on a formula that includes the cost of construction and operation of a power plant.

If the least expensive power source becomes that much cheaper, it will really shake the foundation of many energy debates. One of these debates is how to meet the need for more interstate power lines to transport renewable energy from rural areas to population centers. If large amounts of additional renewable energy sources are added, policymakers will need to work harder to reform the regulatory system to make sure that new interstate power lines get built.

If the average cost of solar power reaches 2 cents a kilowatt-hour, the actual price will be lower in sunnier regions and higher in those that get less sun. However, the continuing decrease in solar electricity costs will actually have the greatest impact in the northern, less sunny regions, because solar power may not currently be the least expensive option there but it will become the cheapest alternative over time.

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Inside Clean Energy: What Happens When Solar Power Gets Much, Much Cheaper?

Photo, posted May 14, 2020, courtesy of Courtney Celley/USFWS via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Positive Tipping Points And Climate | Earth Wise

February 15, 2021 By EarthWise Leave a Comment

A tipping point is a moment when a small change triggers a large and possibly irreversible response.

There has been much discussion of various tipping points that could accelerate climate change in catastrophic ways. A recent paper from researchers at the University of Exeter in the UK discusses a couple of tipping points that could accelerate positive progress on mitigating climate change.

Electric vehicles account for only 2-3% of new car sales globally. In Norway, this figure is more than 50%, mostly thanks to policies that make electric cars the same price to buy as conventional cars. According to the Exeter study, when EVs cost the same to manufacture as conventional cars, it will be a global tipping point. China, the EU, and California together are responsible for half of the world’s car sales and each of these has targets to rapidly decarbonize their economies and policies in place to speed the transition to electric vehicles.

Decarbonizing electric power is the other potential positive tipping point. In Europe, carbon taxes on top of increasing renewable energy generation have tipped coal into unprofitability as they have led to the irreversible destruction of coal plants. Globally, renewables are already generating electricity cheaper than fossil fuels in many countries. Decarbonizing global power generation would in turn help accelerate decarbonization of large parts of transportation, heating and cooling, and industry.

These potential positive tipping points are by no means inevitable. Appropriate policies are needed to overcome various barriers to the clean energy transition. But major changes in transportation and electric power would have a tremendous impact on the global effort to combat climate change.

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Positive ‘tipping points’ offer hope for climate

Photo, posted July 14, 2020, courtesy of Jim Champion via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

A New Carbon Capture Technique | Earth Wise

August 25, 2020 By EarthWise Leave a Comment

Carbon dioxide emissions by electricity generating plants, fossil-fuel burning vehicles, and industry produce about 2/3 of the greenhouse gases driving climate change. Without decreasing these emissions, the earth will continue to get warmer, sea levels will continue to rise, and the world will face more droughts, floods, wildfires, famine and conflict.

Electrification of vehicles and reliance upon renewable energy sources will ultimately drastically reduce the use of fossil fuels and the resultant emissions, but that transition may take too long to reverse the direction of climate change. In the meantime, there is a great need to find effective and efficient ways to capture emissions from fossil fuel plants.

Recent research at the University of California, Berkeley, Lawrence Berkeley National Laboratory, and ExxonMobil has developed a new technique for carbon capture. The technique makes use of metal-organic framework (or MOF) technology. An MOF, modified with nitrogen-containing amine molecules, captures CO2 and then low-temperature steam is used to flush out the CO2 either to be used or sequestered underground.

Experiments demonstrated the technique to have a six-times greater capacity for removing CO2 from the flue gas of a refinery than current amine-based technology. It selectively removed 90% of the emitted CO2.

There is a relatively limited market for captured CO2, so power plants using the capture technology would likely pump the CO2 into the ground, or otherwise sequester it. The cost of doing this sort of emission scrubbing would have to be facilitated by government policies, such as carbon trading or a carbon tax, which would provide the necessary economic incentive for doing carbon capture and sequestration.

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New technique to capture CO2 could reduce power plant greenhouse gases

Photo courtesy of UC Berkeley.

Earth Wise is a production of WAMC Northeast Public Radio.

Electric Buses In Latin America

October 31, 2019 By EarthWise Leave a Comment

Latin America has become increasingly urbanized. In fact, about 80% of the region’s population lives in cities today and by 2050, that figure could climb to 90%. Transportation is the largest and fastest-growing source of energy-related emissions in Latin America and accounts for about a third of all of the region’s carbon dioxide emissions.

Private vehicle ownership is rising in Latin America but at the same time, the region’s rapidly growing cities have increased demand for buses, taxis, and motorcycles. Currently, an estimated 64,000 people die prematurely every year in Latin America and the Caribbean as a result of air pollution, which is mostly caused by transportation emissions.

Given this situation, major cities across Latin America – from Colombia to Argentina – are starting to adopt electric bus fleets. Latin America actually has the highest use of buses per person globally. So, the transition to electric buses is an important step toward meeting climate targets, cutting fuel costs, and improving air quality.

Medellin, Colombia – whose metropolitan area has 3.7 million people – has started to add electric buses to its fleet, the rest of which runs on natural gas. When new units arrive from China later this year, Medellin will have the second largest electric bus fleet in Latin America, after Santiago, Chile.

Worldwide, 425,000 electric buses are in operation, 99% in China. Europe has a couple of thousand while the United States has only 300. But going forward, and especially in Latin America, electric buses are the wave of the future. Estimates are that there will be 1.3 million on the roads by 2040.

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An Increasingly Urbanized Latin America Turns to Electric Buses

Photo, posted April 22, 2018, courtesy of Hans Johnson via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Shutting Down Minnesota Coal Plants

July 8, 2019 By EarthWise Leave a Comment

One of the largest utilities in the United States, Xcel Energy Inc., announced that it will close its remaining coal-fired power plants in the Upper Midwest a decade ahead of its previously-announced schedule. In addition, the company will add 3,000 megawatts of new solar capacity by 2030.

The Allen S. King plant in Oak Park Heights, Minnesota and the Sherburne County Generating Station in Becker, Minnesota are the plants in question. The transition away from coal is a difficult challenge for such small communities. The plant in Becker, for example, employs 300 people in a town of 4,500 and provides 75% of the city’s tax base. Towns like this realize that coal is inevitably going away and must find ways to move beyond their dependence upon it. The Becker plant will not completely close until 2030, but parts will now only run seasonally, and one of the 3 units will close permanently in 2023

Xcel Energy, based in Minneapolis, serves more than 3.3 million electricity customers in 8 states. Last December, the company announced that it would deliver 100% clean, carbon-free electricity by 2050 and would achieve an 80% carbon reduction from its 2005 levels by 2035. It is the first major US utility to set such a goal.

Xcel will increase its investment in energy efficiency measures, bring 1,850 megawatts of new wind capacity online in Minnesota by 2022, and keep its Monticello Nuclear Generating Station operating until 2040, a decade later than planned. The company’s stepped-up clean energy strategy is part of a new legal settlement between the company, environmental organizations, and labor groups that involves Xcel’s proposed $650 million purchase of a 760-megawatt natural gas plant.

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A Major U.S. Utility Is Closing Its Coal-Fired Power Plants a Decade Early

Photo, posted January 3, 2016, courtesy of Tony Webster via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Plant-Based Jet Fuels

May 9, 2019 By EarthWise Leave a Comment

The global aviation industry uses a whole lot of fuel: more than 5 million barrels a day. It is an incredibly energy-intensive industry and almost all of its energy comes from petroleum-based fuels.

While other large energy sectors such as electric power, ground transportation and commercial buildings have well-defined pathways to adopting renewable energy sources, the aviation industry does not have such a straightforward way to make a transition to sustainability. Electrifying planes using batteries or fuel cells is very challenging for a number of reasons, notably the weight restrictions on aircraft. So liquid biofuels as replacements for petroleum-based fuels remain the most promising approach.

A new study at the Lawrence Berkeley National Laboratory concludes that sustainable plant-based biofuels could provide a competitive alternative to conventional petroleum fuels if current development and scale-up initiatives are successful.

Multidisciplinary teams based at the Department of Energy’s Joint BioEnergy Institute are focused on optimizing each stage of the bio-jet fuel production process. This includes bioengineering ideal source plants and developing methods for efficiently isolating the carbohydrates in non-food biomass that bacteria can digest and bioconvert into fuel molecules.

The critical issue is cost. The theoretical cost of bio-jet fuel has come down dramatically in recent years but is still around $16 a gallon. The cost of standard jet fuel is about $2.50 a gallon. So, the real challenge is bridging that gap.

Reducing the cost of the fuel could come both from the material and process improvements that are underway as well as by finding ways to turn the leftover lignin residuals from the bioconversion process into valuable chemicals.

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Bright Skies for Plant-Based Jet Fuels

Photo, posted March 28, 2009, courtesy of Yasuhiro Chatani via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Can Germany Meet Its Energy Goals?

February 4, 2019 By EarthWise Leave a Comment

Germany has been a global leader in efforts to decarbonize its massive economy. A national initiative known as Energiewende – or clean energy transition – has been in place since 2010 and relies heavily on renewable energy sources, energy efficiency, and energy demand management.

The program has involved some of the most aggressive deployment of renewable energy sources in the world. Germany was the first country to install 1 GW of solar energy and still has the 5th largest amount of solar power in the world despite actually being a country with fairly limited sunshine. Germany has nearly 30,000 wind turbines, most of which are onshore, unlike many other countries in northern Europe. Over the past five years, government support and cost to consumers for the shift to clean energy have totaled over $180 billion.

However, despite these efforts, Germany’s greenhouse gas emissions have not declined as rapidly as expected, even though nearly 40% of the country’s electricity now comes from renewable sources.

This lack of expected success comes as a shock to the environmentally conscious German population, nearly 90% of which supports the program.

There are two major problems Germany faces. One is that Germany is Europe’s largest producer of coal, which still generates more than a third of the country’s power. The other is that Germany’s large auto industry is still married to gas- and diesel-fueled cars and emissions from the country’s cars are a big problem.

The Energiewende program was driven by political will and investment certainty. It is unclear whether Germany can muster these forces again. The Merkel government has dragged its feet on environmental issues in recent years. It remains to be seen what effect shifting political power in Germany will have.

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