"The Paris climate agreement will survive a Trump presidency says the US special envoy on climate change Dr Jonathan Pershing.
He was speaking before the arrival of ministers and some heads of state in Marrakech on Tuesday.
They are coming to try to take the next steps to tackle global climate change.
But the meeting has been rocked by the possibility that President-elect Donald Trump will withdraw the US from the pact.
Shape and thrust
US lead negotiator Dr Pershing told a packed news briefing that the passion and dedication displayed in the effort to deliver the Paris treaty was strong enough to withstand the impacts of Trump presidency.
“Heads of state can and will change but I am confident that we can and we will sustain a durable international effort to counter climate change,” he said.
Dr Pershing said that he expected personnel from the Trump transition team to start arriving at the State Department in the coming weeks and they would drive the “shape and thrust” of US diplomacy over the next four years.
On the campaign trail, Donald Trump sketched a plan to “cancel” the Paris Agreement and withhold US payments to the UN body tasked with stemming climate change."