Global sunblock could slow climate change

Pumping a sun-reflective aerosol into the atmosphere could help slow global warming, so       David Keith and Gernot Wagner say the US should begin to research albedo modification

The last time the atmosphere held as much carbon dioxide as it does today was about 3m years ago — a time when sea levels were 10 to 30 metres higher than they are now.

Climate models have long struggled to duplicate those large fluctuations in sea levels — until now. Indeed, for the first time, a high-quality model of Antarctic ice and climate has been able to simulate these large swings.