Use of electric vehicles linked with less air pollution, study shows

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Use of electric vehicles associated with fewer asthma-related ER visits on a local level, study shows

Published Sunday, February 5, 2023 4:24PM EST Last Updated Sunday, February 5, 2023 4:24PM EST

An electric vehicle is plugged into a charger in Los Angeles, Thursday, Aug. 25, 2022. California plans to require all new cars, trucks and SUVs to run on electricity or hydrogen by 2035 under a policy approved Thursday by regulators that seeks a dramatic cut in carbon emissions and an eventual end to gasoline-powered vehicles. (AP Photo/Jae C. Hong)

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In an effort to mitigate the effects of climate change, countries across the globe are involving electric vehicles in their plans to reduce greenhouse gas emissions.

A federal mandate in Canada, for instance, aims to ensure that one-fifth of all passenger cars, SUVs and trucks sold in Canada are electrically-powered by 2026. By 2035, if this mandate is carried out, every passenger vehicle sold in Canada will need to be electric.

But what will this shift to electric vehicles actually do for the environment?

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One team of researchers with the Keck School of Medicine of USC aimed to conducting what it describes as one of the first studies to analyze the environmental and health impacts of electric vehicles on a regional scale. Their research linked the wider integration of zero-emission vehicles with lower levels of local air pollution and some respiratory problems.

鈥淲hen we think about the actions related to climate change, often it鈥檚 on a global level,鈥� Erika Garcia, an assistant professor of population and public health at the Keck School of Medicine, said in a .

鈥淏ut the idea that changes being made at the local level can improve the health of your own community could be a powerful message to the public and to policy makers.鈥�

Using data that spanned from 2013 to 2019, Garcia and the team of researchers compared the registration of zero-emissions vehicles with air pollution levels and asthma-related emergency room visits in California. They found that in regions where more electric vehicles were adopted, emergency room visits dropped, along with with pollution levels.

Sandrah Eckel, an associate professor of population and public health sciences and the study鈥檚 senior author, said their findings offer hope among a reality of climate anxieties.

鈥淲e鈥檙e excited about shifting the conversation towards climate change mitigation and adaptation, and these results suggest that transitioning to [electric vehicles] is a key piece of that.鈥�

Garcia added that the study also evaluated disadvantages faced by those living in lower-income communities, which often see higher pollution levels and related respiratory problems.

Researchers discovered that adoption of zero-emissions vehicles in low-resource neighbourhoods was slower compared to more affluent areas.

The study attributes this disparity to what the researchers call an 鈥渁doption gap鈥� 鈥� referring to groups of people that cannot afford newer vehicles that are electrically-powered.

According to the study, which was published in the journal Science of the Total Environment, the adoption gap 鈥渢hreatens the equitable distribution of possible co-benefits.鈥�

鈥淪hould continuing research support our findings, we want to make sure that those communities that are overburdened with traffic-related air pollution are truly benefiting from this climate mitigation effort,鈥� Garcia said in the release.