By BBC News:
Barack Obama’s outgoing administration announced the contribution of $500m (£406m; €468m) on Tuesday, bringing the total funds to date to $1bn. Mr Obama pledged in 2014 to give $3bn to help tackle the effects of climate change in the poorest countries. Mr Trump has previously called global warming a hoax.
The president-elect has also threatened to pull the US out of the Paris accord – a global agreement on curbing greenhouse gas emissions – and America’s commitment to the fund.
Mr Trump could decide to withhold the rest of the fund.
However, John Kirby, the State Department spokesman who announced the grant, said there was no “nefarious desire or intent” behind the timing.
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