Hundreds of climate experts expect global temperatures to rise to at least 2.5C (4.5F) above preindustrial levels by 2100. Damian Carrington reports

When the Guardian’s environment editor, Damian Carrington, decided to survey the world’s top climate scientists, he had no idea how many of them would want to participate.

“I was astonished by the flood of responses that came back,” he tells Hannah Moore.