According to a report released today by the Union of Concerned Scientists, the carbon impacts of fueling your electric car depend on where you plug it in. The study, entitled “State of Charge: Electric Vehicles’ Global Warming Emissions and Fuel Cost Savings Across the United States,” points out that charging an electric vehicle with coal-based electricity yields the same carbon impact as at conventional car that gets 30 miles per gallon (mpg). If the charging power comes from hydroelectric and natural gas, prevalent in the pacific northwest, the carbon impacts of fueling an electric car equate to over 50mpg, according to the study.
These figures do not account for electric car fabrication footprints, which can have a much larger impact than the fueling cycle according to research from the National Academies of Science. In my recent piece in Christian Science Monitor, I argue:
Electric vehicles don’t eliminate the negative side effects of vehicular travel. They simply move the problems elsewhere – often to contexts where they become more opaque and difficult to address. When we start to exchange one set of side effects for another, the exchange rates become confusing. This opens a space for public relations firms, news pundits, environmentalists, and others to step in and define the terms of exchange to their liking.. The Union of Concerned Scientists report also doesn’t account for the methane released during natural gas fracking, the side effects of hydroelectric dams, and other externalities from energy production.
When the full environmental costs of electric car batteries and hardware are figured in, their green charm begins to appear suspect. Perhaps environmentalists should take a step back and reconsider whether they’d like to become spokespeople for the next round of ecological disaster machines.
See more about the book John Perkins is endorsing here.