Democratic presidential nominee Joe Biden has unveiled a $2 trillion proposal to boost investment in clean energy and combat the global warming as he pledged to rejoin the historic Paris agreement on climate change if elected in the November elections.
US President Donald Trump in 2017 withdrew the United States, the world's No 2 emitter of greenhouse gases behind China, from the 2015 Paris Climate Agreement that brought countries together to mitigate global warming, saying it was too costly.
Biden has said he will return the US to a leadership role on climate change, assertively re-entering the United States in future climate