Declining to leave the stage, he also told the audience: “Our oceans are full of plastic. The Amazon, the lungs of the world is on fire.
“We will be breathing toxic air on our way back home tonight. Toxic air that will kill thousands of people in our beloved capital
“We have to make a change. Making changes takes courage.”
He urged everyone at the dinner at The Hilton on Park Lane in London to make a small change in their daily habits to help the environment.
The presenter had previously called on TV productions to be more forthright in their environmentalism, and push a stronger message.