WASHINGTON — The Biden administration on Thursday (April 22) pledged to slash US greenhouse gas emissions by 50 to 52 per cent from 2005 levels by 2030, a new target it hopes will spur other big emitter countries to raise their ambition to combat climate change.

The goal, unveiled at the start of a two-day climate summit hosted by Democratic president Joe Biden, comes as the United States seeks to reclaim global leadership in the fight against global warming after former president Donald Trump withdrew the country from international efforts to cut emissions.