As Earth’s climate continues to warm, some scientists are looking at doing more than simply reducing humanity’s outpouring of greenhouse gases into the atmosphere by devising ways to actively cool the planet back to temperatures that our civilization is comfortable with. One of the proposed techniques would be to spray massive amounts of sulphur dioxide into the atmosphere to create a cloud layer that would reflect a portion of the Sun’s rays back into space, emulating the cooling effect that the gases from a large volcanic eruption would more