Are electric vehicles better for the environment than gas-powered vehicles?
Electric vs gas environmental impact is nuanced — I'll gather the latest lifecycle data to compare them.
Yes, overall research finds electric vehicles (EVs) are better for the environment than gasoline-powered vehicles over their full lifecycle, even though there are caveats.
1. Lifecycle greenhouse gas emissions are lower
The U.S. Environmental Protection Agency (EPA) states:
> FACT: The greenhouse gas emissions associated with an electric vehicle over its lifetime are typically lower than those from an average gasoline-powered vehicle, even when accounting for manufacturing.
> FACT: Electric vehicles (EVs) typically have a smaller carbon footprint than gasoline cars, even when accounting for the electricity used for charging
This accounts for manufacturing, charging and driving. Other analyses support this:
Argonne National Laboratory researchers estimated that while GHG emissions from EV manufacturing and end-of-life are higher, total GHGs for the EV are still lower than those for the gasoline car.
As renewable sources replace coal and gas-fired generation, emissions related to the operation of BEVs could drop by 86%.
2. Why EVs are more efficient even on a dirty grid
Electric vehicles have no tailpipe emissions. Generating the electricity used to charge EVs, however, may create carbon pollution. But EVs are far more energy efficient:
> EVs use approximately 87%–91% of the energy from the battery and regenerative braking to propel the vehicle. Gasoline vehicles only convert about 16–25% of the energy from gasoline into movement
That efficiency advantage means even when charged from fossil fuel power, EVs are still responsible for significantly fewer GHGs during operation, because EVs have zero tailpipe emissions and are typically responsible for significantly fewer GHGs during operation
3. Manufacturing impact is higher upfront, but paid back
The caveat is battery production:
However, studies find this "carbon debt" is typically recovered within 1 to 2 years of driving due to lower operational emissions, and overall lifetime emissions remain lower. Recycling EV batteries can reduce the emissions associated with making an EV by reducing the need for new materials.
4. Air quality and health benefits
A major environmental advantage unrelated to climate is local air pollution:
Even if electricity generation creates some air pollution, it typically comes from power stations which might have better pollution controls than you could implement in a conventional car and are usually located further away from densely populated areas.
Bottom line
Citations (1)
- Electric Vehicle Myths
Backs: “1. Lifecycle greenhouse gas emissions are lower. The U.S. Environmental Protection Agency (EPA) states: FACT: The greenhouse gas emissions associated with an electric vehicle over its lifetime are typically lower than those from an average gasoline-powered vehicle, even when accounting for manufacturing.”