‘It was like an apocalyptic movie’: 20 climate photographs that changed the world

They are the images that made us sit up and take notice. As world leaders gather for Cop27, these pictures prove that global heating isn't a distant possibility - it's already here

For a week in July 2018, a giant 100m-tall iceberg loomed over a tiny village on the west coast of Greenland. Villagers were evacuated, and the world watched in suspense: if a chunk of the 10m-tonne iceberg had broken apart or calved", it would have caused a tsunami and obliterated the settlement of Innaarsuit. Eventually, it drifted away from the shore - but as glaciers melt, we can expect to see more masses of ice breaking off and floating dangerously close to land.