Guardian: The world will have to take drastic action within two years to reduce greenhouse gas pollution if it is to avoid the worst effects of climate change, a new study warns. Weeks before world leaders meet to discuss the next big international treaty on cutting emissions, the scale of risk posed by failing to act rapidly is spelt out today by the UK Met Office’s Hadley Centre. The study shows that cutting global emissions by 3% a year from 2010 offers the only possible hope of …