Would a rise in global temperature catastrophically increase sea levels?
Over the last million years, Earth’s sea level has lowered during ice ages – it was 140 meters lower 18,000 years ago; and elevated during interglacials – it was 6 meters higher 125,000 years ago. The sea level would again rise to that 6 meter high if the Greenland ice melted, which would be devastating for coastal populations. Some skeptics don’t believe that there will be a substantial net reduction in the world’s ice, even if temperatures increase as the IPCC predicts.
