https://arstechnica.com/cars/2018/10/gm-wants-alternative-to-fuel-economy-standards-from-obama-rollback-from-trump/

On Friday, General Motors wrote to the Trump Administration in support of a national zero-emissions vehicle (ZEV) program, which would require seven percent of automakers' sales to be zero-emissions by 2021. That percentage would increase by two percent per year until reaching 25 percent in 2030.