<p>An international consortium of geoscientists has reconstructed atmosphereric levels of CO2 going back 66 million years using proxies in the geoloogical record. Today's concenteration, 420 parts per million, is higher than it's ever been in 14 million years.</p>
kalerkantho.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from kalerkantho.com Daily Mail and Mail on Sunday newspapers.