A second Trump term would be 'game over' for the climate, says one of the world's top climate scientists

Michael Mann, one of the world's most eminent climate experts, says Earth's future is in the hands of American citizens'

This article is published as part of Covering Climate Now, a collaboration of 400-plus news outlets to strengthen coverage of the climate story. The Guardian is the lead partner of CCN.

Michael Mann, one of the most eminent climate scientists in the world, believes averting climate catastrophe on a global scale would be essentially impossible" if Donald Trump is re-elected.