Three Democratic presidential candidates have signed off on legislation to ban the sale of gas-powered cars by 2040. The candidates are: Bernie Sanders, Kirsten Gillibrand, and Kamala Harris. The bill would also mandate that 50% of new vehicle sales be zero-emission vehicles by 2030.
There are, however, legitimate questions over the feasibility of drastically ramping up electric vehicle sales. Part of the problem is building out all the charging stations needed to keep electric cars moving.
Zero-emission vehicles made up just 1.9% of U.S. car sales nationwide, according to the Auto Alliance.
The environmental benefits of electric vehicles also depend on what energy sources are used to generate power and make batteries. Recent studies have found electric cars may not have much of an impact on greenhouse gas emissions.