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Electric Cars And The Environment | Earth Wise

April 20, 2020 By EarthWise Leave a Comment

electric cars are good for the environment

There are articles in the media all the time questioning whether electric cars are really better for the environment than those powered by fossil fuels.  The usual argument is that once emissions from vehicle production and electricity generation are taken into account, electric cars are no greener than gas cars, or even worse for the environment.  Of course, these arguments tend to be made by oil companies and their supporters.

A new study by three European universities looked at this very issue in detail. They carried out a life-cycle assessment in which they not only calculated greenhouse gas emissions generated when using cars, but also in the production chain and waste processing.

Their conclusions are that under current conditions, driving an electric car is better for the climate than conventional gasoline cars in 95% of the world.  The only exceptions are places like Poland, where almost all electricity comes from coal-fired plants.

Average lifetime emissions associated with electric cars are up to 70% lower than gas cars in countries like Sweden and France and about 30% lower in England.

It is important to note than in a few years, even inefficient electric cars will be less emission-intensive than gas cars because electricity generation is becoming less carbon-intensive all the time.  The study projects that by 2050, half of the world’s cars will be electric resulting in carbon dioxide emission reductions of 1.5 billion tons.

The study states that the idea that electric cars could increase emissions is a myth.  The detailed study has run the numbers for all around the world and even in the worst-case scenario, there would be a reduction in emissions in almost all cases.

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Electric cars better for climate in 95% of the world

Photo, posted February 13, 2019, courtesy of Guillaume Vachey via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Lighting Up Batteries

December 24, 2019 By EarthWise 2 Comments

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.

Clean Gas From An Artificial Leaf

November 27, 2019 By EarthWise Leave a Comment

Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy.  It is often described as the green engine of life on earth.

For quite some time, there have been extensive research efforts around the world in the area of artificial photosynthesis.  The goal is to somehow mimic the behavior of plants in order to generate clean-burning fuels using nothing more than sunlight and the carbon dioxide in the air.

Researchers at the University of Cambridge have recently demonstrated a so-called artificial leaf that can directly produce syngas using sunlight.   Syngas is a fuel gas mixture consisting primarily of hydrogen and carbon monoxide.  Most people haven’t heard of syngas, but many products are created using it.  Being able to produce it sustainably would be a critical step to a far greener chemical and fuel industry.

The artificial leaf contains two light absorbers, similar to the molecules in plants that harvest sunlight, which are combined with a catalyst made from the naturally abundant element cobalt.  When the device is immersed in water, one light absorber uses the catalyst to produce oxygen.  The other carries out the chemical reaction that reduces carbon dioxide and water into carbon monoxide and hydrogen.  The result is the syngas mixture.

It turns out that even a rainy or overcast day provides enough light to drive the process.

Previous artificial leaf devices have mostly just produced hydrogen.  The Cambridge device produces syngas thanks to the novel combination of materials and catalysts it uses.

The researchers are now focused on finding ways to use the technology to produce a sustainable gasoline substitute.

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‘Artificial leaf’ successfully produces clean gas

Photo, posted August 15, 2014, courtesy of Mike Mozart via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Hydrogen From The Ocean

November 15, 2019 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2016/08/EW-08-30-16-Hydrogen-from-the-Ocean.mp3

Hydrogen is the most abundant element in the universe.  Estimates are that it comprises 75% of all matter.  There is plenty of it here on earth too, but almost none of it is in its elemental form.  It is mostly bound up in compounds like water.

[Read more…] about Hydrogen From The Ocean

Other Ways To Cut Vehicle Emissions

October 17, 2019 By EarthWise Leave a Comment

It is pretty clear that the way to drastically reduce vehicle greenhouse gas emissions is to switch as many vehicles as possible to electric power.  As a result, more and more localities are putting in place policies that encourage electrification.

While there is no doubt that electrification is the long-term solution to vehicle emissions, a recent study by MIT and the Ford Motor Company found that, in the short term, there are some places in the US where electric cars are not the best way to reduce emissions.

The study looked at a variety of factors that affect the relative performance of vehicles.  These include the role of low temperatures in reducing battery performance, regional differences in the average number of miles driven annually, and significant differences in the way electricity is generated in different parts of the US.

The results showed that electric vehicles definitely provide the greatest impact in reducing greenhouse gas emissions for most of the country – and particularly on both coasts and in the south – but that there are some places in the upper Midwest where the greatest reduction would be achieved by the use of lightweight gasoline-powered vehicles.

In places like parts of Wisconsin and Michigan, it is mostly rural, there are cold winters, and electricity is predominantly generated by coal-powered plants.  In these places, if gas-powered lightweight cars were to be used, the overall benefit would be greater than that of electric cars.  Unfortunately, there are no high-volume lightweight gasoline-powered mid-sized cars on the market in the US.  Ironically, the only cars of that class using lightweight aluminum construction are Teslas.

While electric cars are truly the long-term solution, the study does demonstrate the benefits of reducing the weight of vehicles.

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What’s the best way to cut vehicle greenhouse-gas emissions?

Photo, posted February 9, 2018, courtesy of Dave Field via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

The New York Climate Plan

July 24, 2019 By EarthWise Leave a Comment

New York lawmakers have passed a sweeping climate plan that requires the state to eliminate almost all of its greenhouse gas emissions by 2050.  The plan calls for the phase-out of gasoline cars and oil- and gas-burning furnaces and requires all of the state’s electricity to come from carbon-free sources.

The Climate Leadership and Community Protection Act requires the state to slash its carbon emissions to 85% below 1990 levels by 2050 and to offset the remaining 15% by other means such as removing carbon dioxide from the atmosphere.  The bill requires New York to get 70% of its electricity from renewable sources by 2030.

The challenges of reaching the program’s goals are daunting.   New York has so far only reduced its emissions by 8% since 1990.  The state currently does get 60% of its electricity from carbon-free sources – mostly hydroelectric dams and nuclear power plants – but it will require offshore windfarms, ramped-up solar installations, and battery storage systems to push the numbers dramatically higher.

Transportation, which is responsible for a third of New York’s emissions, will be particularly tough to tackle.  The Trump administration is rolling back federal vehicle efficiency rules and is trying to prevent states from setting stricter standards.  Currently, electric car ownership is primarily attractive for single-family homeowners who can plug in their cars at home.  Far more pervasive charging stations – for example, all over the streets of New York City – would be needed to make electric cars practical for everyone.

The plan aims for industries to bear most of the financial burden, but supporters say that the costs of not acting on climate will be vastly greater for businesses.  The plan’s deadlines for major emissions reductions are a decade away but there will be much to do quite soon.

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New York to Approve One of the World’s Most Ambitious Climate Plans

Photo, posted September 17, 2009, courtesy of Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Powering Cars With Cactus Juice

June 24, 2019 By EarthWise Leave a Comment

Back in 2016, a company called Nopalimex, located in Micoacan, central Mexico, built the world’s first cactus-powered energy plant.  The facility utilizes a biodigester to make biogas from nopal, also known as prickly pear cactus.  The nopal plant has been called the ‘Green Gold of Mexico’ and is a staple in Mexican diets, medicine and cosmetics.

Nopalimex is now using the cactus to make biofuel for vehicles.

The fruit of the cactus is pureed, mixed with manure, and then left to decompose, producing methane.  The methane produced – about eight tons a day – fuels the biodigester which powers the company’s corn chip and cactus chip production and is being tested in a fleet of government vehicles.

The biogas will cost just 65 cents per liter, which is about a third cheaper than the cost of regular gasoline.  Using prickly pear as a feedstock for biofuel is attractive because it can be grown in places where traditional energy crops cannot.  One can imagine vast fields of cacti in remote, arid areas of the country where normal crops cannot grow.  It would not suck up the resources or space needed to feed people, which is an ongoing criticism of current bioenergy crops.

As long as the nopals are regularly replanted, the process is almost entirely sustainable, producing only water and nopal waste, which can be used to fertilize other crops.

Finding sustainable ways to produce fuel while doing minimal damage to the environment is an important challenge for countries around the world.  In Mexico, harnessing the power of the prickly pear cactus is a unique and clever solution.

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Mexico’s ‘green gold’: The company powering cars with cactus juice

Photo, posted July 8, 2006, courtesy of Christian Frausto Bernal via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Affordable Electric Cars

May 1, 2019 By EarthWise Leave a Comment

The main reasons that electric cars haven’t taken over are that they didn’t drive far enough on a charge, it took too long to charge them, and, most of all, they cost too much.

In recent years, the problem with driving range has steadily been disappearing as electric cars that can go over two hundred and even over three hundred miles on a charge have entered the market.  Charging time has also become less of a problem.  Tesla’s network of Superchargers can provide 200 miles worth of charge in half an hour and their next generation of chargers, which are just starting to appear, can cut that time much further.

As for cost, a new report by transportation analysts at Bloomberg New Energy Finance predicts that electric vehicles will be cost-competitive with combustion-engine cars by 2022.

The main reason is that the cost of EV batteries has been plummeting.  In 2015, batteries made up 57% of the total cost of an electric vehicle.  Today, that number is down to 33% and is expected to drop to 20% by 2025.  In addition, the cost of electric powertrain systems is also dropping.  The Bloomberg report predicts that over the next decade, costs for motors, inverters, and power electronics could be 25 to 30% cheaper than today.

The cost of electric vehicles has been dropping faster than predicted.  Bloomberg’s report on the subject in 2017 predicted cost parity in 2026.  Last year, they changed it to 2024.  And now, they are saying 2022.

Given that electric cars are much cheaper to drive than gasoline cars, finding reasons not to drive them is getting harder to do.

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Electric Cars Could Be As Affordable as Conventional Vehicles In Just Three Years

Photo, posted November 17, 2018, courtesy of Jakob Harter via Flickr.

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Fumes From Gas Stations

November 15, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/11/EW-11-15-18-Fumes-from-Gas-Stations.mp3

A study by environmental health scientists at Columbia University examined the release of vapors from gas station vent pipes and found that emissions were 10 times higher than the estimates used to establish setback regulations that determine how close schools, playgrounds, and parks can be to the facilities.

[Read more…] about Fumes From Gas Stations

Hydrogen Powered Cars

October 31, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/10/EW-10-31-18-Hydrogen-Powered-Cars.mp3

Hydrogen-powered cars are trying to make inroads in the rapidly-evolving automobile market. Several major automakers – including Hyundai, Toyota and Honda continue to invest heavily in the technology while selling a limited number of cars around the world.

[Read more…] about Hydrogen Powered Cars

The Fight For Greener Cars

June 28, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/06/EW-06-28-18-The-Fight-for-Greener-Cars.mp3

U.S. automakers have always been reluctant partners in the nation’s efforts to reduce air pollution and improve fuel efficiency. There have been struggles for decades between the carmakers and the government in setting Corporate Average Fuel Economy (or CAFÉ) standards.  During the Obama administration, some of the most demanding fuel economy and emissions standards were mandated.

[Read more…] about The Fight For Greener Cars

Greener Biofuel

May 17, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/05/EW-05-17-18-Greener-Biofuel.mp3

Engineers from the National University of Singapore have recently discovered that a naturally occurring bacterium is capable of directly converting cellulose to biobutanol, a promising biofuel.

[Read more…] about Greener Biofuel

The Automobile Future: Dream or Nightmare?

February 21, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2018/02/EW-02-21-18-The-Automobile-Future.mp3

Visionaries tout a future in which cars are electric, self-driving, and shared.  All three of these things are starting to happen today, but will they come together to produce a future where congestion and pollution are things of the past?

[Read more…] about The Automobile Future: Dream or Nightmare?

Advantages Of Plug-In Hybrids

January 24, 2018 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2017/12/EW-01-24-18-Advantages-of-Plug-In-Hybrids.mp3

Plug-in hybrid vehicles are ones that can run both on electricity provided by a power outlet as well as on gasoline.  There are many of them on the market these days built by quite a few car makers.  But these vehicles have an undeserved reputation as being the fig leaf of electric mobility.  Many environmental organizations and political decision-makers don’t consider them to be “real electric cars.”

[Read more…] about Advantages Of Plug-In Hybrids

China And Electric Cars

December 19, 2017 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2017/12/EW-12-19-17-China-and-Electric-Cars.mp3

While American politicians were voting on eliminating tax credits for buyers of electric vehicles, auto executives from around the world were gathering to make ambitious plans to sell more electric cars in China.

[Read more…] about China And Electric Cars

Lawnmower Pollution

October 25, 2017 By EarthWise Leave a Comment

https://earthwiseradio.org/wp-content/uploads/2017/10/EW-10-25-17-Lawnmower-Pollution.mp3

Over 50 million Americans mow their lawns each week, which uses 800 million gallons of gas per year and produces tons of air pollutants.  Garden equipment engines were completely unregulated with respect to emissions until the late 1990s and still emit high levels of carbon monoxide, volatile organic compounds, and nitrogen oxides.  In fact, gas mowers and their relatives like leaf blowers and edgers produce 5% of the air pollution in this country.

[Read more…] about Lawnmower Pollution

Sustainable Ethanol

August 10, 2017 By EarthWise

https://earthwiseradio.org/wp-content/uploads/2017/07/EW-08-10-17-Sustainable-Ethanol.mp3

Most gas stations in the U.S. sell a blend of 90% gasoline and 10% ethanol.  Mandated by legislation, the 14 billion gallons of ethanol consumed annually by American drivers is mostly made from fermented corn.   Producing this ethanol requires millions of acres of farmland.

[Read more…] about Sustainable Ethanol

Cleaning Britain’s Air

April 13, 2017 By EarthWise

https://earthwiseradio.org/wp-content/uploads/2017/03/EW-04-13-17-Cleaning-Britains-Air.mp3

According to a new study by the non-profit group Carbon Brief, carbon dioxide emissions in the United Kingdom are at their lowest levels since the 1920s.  Four factors are responsible:  a record drop in coal use, the rapid growth of renewable energy, the expansion of energy efficiency programs, and the increased use of natural gas for electricity power plants.

[Read more…] about Cleaning Britain’s Air

How Green Are Green Cars?

December 9, 2016 By EarthWise

https://earthwiseradio.org/wp-content/uploads/2016/11/EW-12-09-16-How-Green-Are-Green-Cars.mp3

Electric cars are generally seen as the way to eliminate or at least dramatically reduce the disastrous effects of personal transportation on the environment.  They still constitute only a tiny fraction of the cars on the road, but their popularity and availability is growing.

[Read more…] about How Green Are Green Cars?

Old Car Or New Car?

April 26, 2016 By WAMC WEB

https://earthwiseradio.org/wp-content/uploads/2016/04/EW-04-26-16-Old-Car-or-New-Car.mp3

Every few years many of us face a big decision: is it time to buy a new car? The trusty vehicle that has carried us so well has gotten too rusty to pass inspection or too old to assure us of its continued reliability. What vehicle choice is best for the environment?

[Read more…] about Old Car Or New Car?

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