900,000-year-old ice may destroy US case on Kyoto

An Italian expedition to the Antarctic has taken a sample of ice which is more than 900,000 years old and could give scientists evidence of past climate changes which would discredit global warming doubters.

The ice core, which is double the age of previous samples, will show how much carbon dioxide there was in the atmosphere during previous warm and cold phases in the climate and whether the current concentrations caused by burning fossil fuels are likely the lead to catastrophic global warming later this century ... Guardian Unlimited