Act fast to curb global warming, or extract CO2 from air - U.N.

By Alister Doyle, Environment Correspondent BERLIN (Reuters) - Faster action is needed to keep global warming to agreed limits and delays until 2030 could force reliance on technologies to extract greenhouse gases from the air, a U.N. report said on Sunday.

The study, drawing on the work of more than 1,000 experts, said a shift from fossil fuels to low-carbon energy such as wind, solar or nuclear power was affordable and would shave only about 0.06 percentage point a year off world economic growth.