Climate-Friendly Cars

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May 24, 2017

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climate-friendly cars

Since our first report on climate-friendly cars in 2013, the options for low-emissions vehicles have grown. The continued shift away from coal as an electricity generating source has made electric and plug-in hybrid cars a greener choice in some states. But just how climate-friendly these cars are depends on three main points:

  • Since 2012, 39 states have seen a decrease in coal for electricity generation.  That difference has been made up using natural gas, wind, solar, nuclear, and other sources. States where electricity generation still comes mostly from coal include Kentucky, West Virginia, and Wyoming. In these states, an efficient gas-powered car is still the best option for the environment, with more than a dozen gas-powered cars on the market being more climate friendly than the best electric car.
  • Manufacturing an electric car generally produces more greenhouse gas emissions than manufacturing a comparable gas-powered car, with most of the extra emissions coming from an electric vehicle’s bigger battery. So over a shorter driving life (e.g., less than 50,000 miles), the manufacturing emissions have more of an influence on total lifetime emissions in an electric car.
  • As a result, operating an electric car less than 50,000 miles may actually be less climate friendly than running its gas-powered counterpart for the same distance. Using that shorter lifecycle, there are only 31 states where an all-electric car is the most climate-friendly option for consumers. In the other 19 states, a gas-powered hybrid is the most climate-friendly option.

In this updated analysis, we examine all-electric cars, plug-in hybrids, conventional hybrids, and gasoline-powered cars. We primarily considered a driving lifetime of 100,000 miles to calculate a car’s total emissions.

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