Tom Krisher and Hope Yen Administrator of the Environmental Protection Agency Michael Stanley Regan, left, is welcomed by Italian Minister for Ecological Transition Roberto Cingolani as he arrives at Palazzo Reale in Naples, Italy, Thursday, July 22, 2021, to take part in a G20 meeting on environment, climate and energy. (AP Photo/Salvatore Laporta) July 27, 2021 - 2:37 PM WASHINGTON (AP) â In a major step against climate change, President Joe Biden is proposing a return to aggressive Obama-era vehicle mileage standards over five years, according to industry and government officials briefed on the plan. He's then aiming for even tougher anti-pollution rules after that to forcefully reduce greenhouse gas emissions and nudge 40% of U.S. drivers into electric vehicles by decadeâs end.