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

Yes

I'll compare electric and gas cars to see which is better for the environment.

Yes, on balance electric vehicles (EVs) are considered better for the environment than gasoline-powered vehicles over their full lifecycle, although EVs have higher environmental impacts during manufacturing.

1. Lifecycle Greenhouse Gas Emissions Are Lower

> FACT: Electric vehicles (EVs) typically have a smaller carbon footprint than gasoline cars, even when accounting for the electricity used for charging

> 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

Multiple lifecycle assessments reach the same conclusion:

•The R&D GREET Life Cycle Assessment Model found that EVs have 46% lower lifecycle emissions.

•The International Council on Clean Transportation found that EVs sold in Europe had 73% lower lifetime emissions compared to combustion cars.

•A MIT-led study published in Environmental Research Letters found in most US locations, EVs save between 40% and 60% of emissions as compared with combustion vehicles.

The study also found there is no zip code in the country where EVs produce higher lifecycle emissions than internal-combustion vehicles, and even with the country's most carbon-intensive electricity mix, BEVs do not raise lifecycle emissions compared to ICEVs.

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

A key reason is 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

2. Zero Tailpipe Emissions Improve Local Air Quality

Electric vehicles have no tailpipe emissions. EVs reduce or eliminate tailpipe emissions by curbing gasoline use and this helps air quality and promotes better health.

Importantly, 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.

3. Why EVs Are Not Zero-Impact: Manufacturing and Battery Production

EVs start with higher emissions during manufacturing:

•Electric vehicles produce approximately 50-70% more greenhouse gas emissions during manufacturing than equivalent petrol cars. The reason is simple: battery production is energy-intensive and requires mining, refining, and processing lithium, cobalt, nickel, and other materials.

•Battery manufacturing accounts for 15% to 20% of an EV's lifecycle emissions.

•Mining lithium and manufacturing these batteries is water-intensive and contributes to air, soil, and water pollution.

•Mining the raw materials for these batteries often leads to habitat destruction, water pollution, and greenhouse gas emissions.

There are extra greenhouse gas emissions for an EV relative to a petrol car that arise from mining and battery manufacture.

However, this "carbon debt" is typically paid back quickly because operating emissions are so much lower:

•The analysis included emissions from fuel production, battery manufacturing, and found that during the first two years of operation, electric vehicles produce 30% higher CO₂ emissions than gasoline vehicles when all lifecycle factors are considered. However, after the second year of on-road use, electric vehicles begin reducing cumulative emissions compared to gasoline alternatives.

•Argonne National Laboratory researchers found 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 estimates suggest the difference is made up in about 20 thousand km based on current electricity grid's emissions, so after 1 or 2 years of average driving.

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

4. The Electricity Grid Matters

The amount of carbon pollution from generating electricity varies widely based on how local power is generated, e.g., using coal or natural gas, versus renewable resources like wind or solar.

The electricity production mix is the most important contributor to regional variation in EV emissions savings. Cleaner power production means bigger savings.

•In most studies, even in coal-heavy states like West Virginia, EVs typically win the carbon emissions race.

•In coal-powered Appalachian counties, EV sedans are still expected to produce 60% less.

•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.

As the U.S. grid continues to shift toward renewable sources, the emissions benefits of EVs will become more pronounced.

Bottom Line

•Better over lifetime: Over their full life (manufacturing + driving + electricity production + disposal), EVs emit significantly less greenhouse gas than comparable gasoline cars in virtually all US regions.

•Better for local air: Zero tailpipe emissions eliminates NOx, CO, VOCs and exhaust particulates in cities.

•Worse at factory gate: EV manufacturing, especially lithium mining and battery production, is more energy-intensive, water-intensive and polluting.

•Payback period: The higher manufacturing emissions are typically offset within 1-2 years / ~20,000 km of driving, after which the EV is cleaner for the rest of its life, especially if charged on a cleaner grid and recycled at end-of-life.

Citations (2)

1epa.govGovernment
Electric Vehicle Myths | US EPA
Backs: “Yes, on balance electric vehicles (EVs) are considered better for the environment than gasoline-powered vehicles over their full lifecycle, although EVs have higher environmental impacts during manufacturing. 1. Lifecycle Greenhouse Gas Emissions Are Lower. FACT: Electric vehicles (EVs) typically have a smaller carbon…”
evidence, official document, points to yes. Claim: EVs typically have a smaller lifecycle carbon footprint than gasoline cars, even accounting for electricity used for charging and manufacturing.
2insideevs.comNews and media
Yes, EVs Really Are Cleaner Than Gas Cars. Here's By How Much
Backs: “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. Multiple lifecycle assessments reach the same conclusion: The R&D GREET Life Cycle Assessment Model found that EVs…”
statistic, article, points to yes. Claim: Multiple lifecycle assessments (GREET, ICCT, MIT) find EVs have 40-73% lower lifecycle emissions than combustion vehicles.