Mr Trump's main advisers are due to meet on Tuesday to review his threat to quit the 2015 Paris Agreement to limit global warming, which is backed by governments as diverse as China, OPEC oil producers and the poorest African states.
At UN negotiations that began on Monday in the German city of Bonn, the chairman of the talks, Moroccan Foreign Minister Salaheddine Mezouar, said global momentum to combat climate change was irreversible and it would be "difficult or foolish" for anyone to defy public pressure for action.
