4. How much are sea levels expected to rise by, say, 2100?
According to the latest projections from the Intergovernmental Panel on Climate Change (IPCC), a 2 degree increase in temperature by the end of this century would result in about a half a meter (1.5 feet) of sea level rise. If we drastically and immediately reduce the amount of greenhouse gasses we are currently emitting, the sea level will still continue to rise as the result of the warming we have already seen, but it should be less, likely around 40 cm (15 inches). If we continue increasing greenhouse gas emissions at the current rate, the increase in sea level could be up to double that amount, or 80 cm (31 inches) by 2100.