WASHINGTON — 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 decade’s end. The proposed rules from the Environmental Protection Agency and the Department of Transportation reflect Biden’s pledge to attack climate change but also balance concerns of the auto industry, which is urging a slower transition to zero-emission electric vehicles.