Are electric vehicles better for the environment than gas-powered vehicles?

Electric vs. gas on the environment — I'll gather the latest lifecycle evidence to compare them fairly.

Yes, according to most lifecycle research — electric vehicles (EVs) are generally better for the environment than gas-powered vehicles, but they are not impact-free. The advantage comes when you look at total "cradle-to-grave" or lifecycle emissions, not just one stage.

1. Lifecycle greenhouse gas emissions are typically lower for EVs

> 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

Even accounting for these electricity emissions, research shows that an EV is typically responsible for lower levels of greenhouse gases than an average new gasoline car.

Studies consistently quantify that reduction:

•Argonne National Laboratory's GREET Life Cycle Assessment Model, which examines "the energy use and environmental impacts of vehicles, fuels, chemicals, and materials at multiple points along their life cycles," It found that EVs have 46% lower lifecycle emissions.

•Last year, the International Council on Clean Transportation found that EVs sold in Europe had 73% lower lifetime emissions compared to combustion cars. PHEVs were 30% better.

•A 2021 ICCT white paper found that the lifetime emissions of an average medium-size electric car were lower compared with a gasoline-powered car by "66%–69% in Europe, 60%–68% in the United States, 37%–45% in China, and 19%–34% in India."

•A new MIT-led study focused on the United States and published in Environmental Research Letters found: In most locations, EVs save between 40% and 60% of emissions as compared with combustion vehicles, but it can be as low as 0% and as high as 82%

That MIT study found that cleaner power production means bigger savings, but critically:

> "Even with the country's most carbon-intensive electricity mix, however, BEVs do not raise lifecycle emissions compared to ICEVs,"

2. Why EVs win out over time despite higher manufacturing emissions

Some studies have shown that making a typical EV can create more carbon pollution than making a gasoline car. This is because of the additional energy required to manufacture an EV's battery.

Still, over the lifetime of the vehicle, total GHG emissions associated with manufacturing, charging, and driving an EV are typically lower than the total GHGs associated with a gasoline car. That's because EVs have zero tailpipe emissions and are typically responsible for significantly fewer GHGs during operation

Specific impacts of battery production:

•Electric car batteries rely on the extraction of raw materials, such as lithium, cobalt, and nickel. Mining these resources can lead to significant environmental impacts, including habitat destruction, water pollution, and increased carbon emissions.

•Without stringent environmental protections, mining and refining minerals can cause deforestation, threaten biodiversity, pollute air and waterways, and leave toxic tailings (rock waste).

However that upfront "carbon debt" is paid back relatively quickly:

•EVs have higher production emissions due to battery manufacturing. However, they quickly become cleaner than gas cars after about 20,000 miles of driving.

•Argonne National Laboratory co-authored a 2023 study that analyzed cradle-to-grave greenhouse gas emissions... Kelly said the study found that under current conditions it would take an electric car 19,500 miles, or less than two years of typical driving in the U.S., to pay back the increased emissions of the manufacturing process and break even with a comparable gasoline car.

Other advantages that help EVs over their operating life:

•Energy efficiency: 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

•No tailpipe emissions and local air quality: going electric also means taking emissions out of cities, improving local air quality. Even if charging an EV still results in emissions, they are usually produced farther from where many people live.

•Recycling: Recycling EV batteries can reduce the emissions associated with making an EV by reducing the need for new materials.

3. Important nuances and caveats

•Electricity source matters. The emissions associated with driving an electric car, therefore, vary from region to region, depending on how carbon intensive the electricity mix is. For example, driving an electric car in California will result in lower emissions than driving the same car in West Virginia, since the latter is highly reliant on coal

The electricity production mix is the most important contributor to regional variation in EV emissions savings

•EVs are not zero-emitting. "EVs are not zero-emitting vehicles. Hence, they never reach net-zero," — they still produce emissions during manufacturing and from electricity generation.

•The benefit grows as the grid gets cleaner. To the extent that more renewable energy sources like wind and solar are used to generate electricity, the total GHGs associated with EVs could be even lower. And as the U.S. grid continues to shift toward renewable sources, the emissions benefits of EVs will become more pronounced

Bottom line

Multiple independent analyses from the U.S. EPA, U.S. DOE/Argonne National Laboratory, ICCT, and MIT conclude that, on average and over their full lifetimes including manufacturing, EVs emit significantly less — roughly one-third to one-half — the greenhouse gases of comparable gasoline cars in the U.S., with even larger savings in regions with cleaner electricity. The main environmental trade-offs are the higher upfront emissions and ecological impacts of mining for battery minerals, which are typically offset within 1-2 years of driving.

Citations (3)

1epa.govGovernment
Electric Vehicle Myths | US EPA
Backs: “The advantage comes when you look at total "cradle-to-grave" or lifecycle emissions, not just one stage. 1. Lifecycle greenhouse gas emissions are typically lower for EVs. FACT: The greenhouse gas emissions associated with an electric vehicle over its lifetime are typically lower than those from an average…”
2insideevs.comNews and media
Yes, EVs Really Are Cleaner Than Gas Cars. Here's By How Much
Backs: “Even accounting for these electricity emissions, research shows that an EV is typically responsible for lower levels of greenhouse gases than an average new gasoline car. Studies consistently quantify that reduction: Argonne National Laboratory's GREET Life Cycle Assessment Model, which examines "the energy use and…”
3factcheck.orgNonprofits and think tanks
Electric Vehicles Contribute Fewer Emissions Than Gasoline-Powered Cars Over Their Lifetimes - FactCheck.org
Backs: “Last year, the International Council on Clean Transportation found that EVs sold in Europe had 73% lower lifetime emissions compared to combustion cars. PHEVs were 30% better. A 2021 ICCT white paper found that the lifetime emissions of an average medium-size electric car were lower compared with a gasoline-powered…”