WASHINGTON (AP) — An unexpected deal reached by Senate Democrats would be the most ambitious action ever taken by the United States to address global warming and could help President Joe Biden come close to meeting his pledge to cut greenhouse gas emissions in half by 2030, experts said Thursday, as they sifted through a massive bill that revives action on climate change weeks after the legislation appeared dead. The deal would spend nearly $370 billion over 10 years to boost electric vehicles, jump-start renewable energy such as solar and wind power and develop alternative energy sources like hydrogen. The deal stunned lawmakers and activists who had given up hope that legislation could be enacted after West Virginia Sen. Joe Manchin said he could not support the measure because of inflation concerns.