Mr Johnson told world leaders that TV character Kermit the Frog was “wrong” when he sang It’s Not Easy Bein’ Green, adding: “We have the technology; we have the choice before us.”
And, with little more than a month until COP26 begins, the prime minister said: “We are awesome in our power to change things and awesome in our power to save ourselves.
“In the next 40 days we must choose what kind of awesome we are going to be.
“I hope that COP26 will be a 16th birthday for humanity in which we choose to grow up, to recognise the scale of the challenge we face, to do what posterity demands we must.
“I invite you in November to celebrate what I hope will be a coming of age and to blow out the candles of a world on fire.”