"Who occupies the White House for the next four years could play a critical role in the fight against dangerous climate change, experts say. Matt McGrath weighs the likely environmental consequences of the US election.
Scientists studying climate change say that the re-election of Donald Trump could make it "impossible" to keep global temperatures in check.
They're worried another four years of Trump would "lock in" the use of fossil fuels for decades to come - securing and enhancing the infrastructure for oil and gas production rather than phasing them out as environmentalists want.
Joe Biden's climate plan, the scientists argue, would give the world a fighting chance."