Concerns abound about what a Donald Trump presidency in the United States could mean for the Paris Agreement, the new head of the U.N. Framework Convention on Climate Change has said.

In an interview with ClimateWire, Executive Secretary Patricia Espinosa said the way countries respond to any bid by the Republican Party nominee to withdraw the country from the deal, as he has threatened to do, would determine whether its consequences would be far-reaching.

"What would happen? What would be the reaction of the international community? What would be the reaction in the U.S., where today most U.S. citizens believe climate change is real and something has to be done about it?" Espinosa said. "It's important that we're aware that it would be a very, very complex situation."

Read the full ClimateWire interview here.