IPCC Fourth Assessment Report
Scientists: Carbon dioxide must be removed from the atmosphere to avoid extreme climate change
Humans must start removing carbon dioxide from the atmosphere as soon as possible to avoid saddling future generations with a choice between extreme climate change or spending hundreds of trillions of dollars to avoid it, according to new research.
Climate change fight affordable, cut emissions to zero by 2100: UN
Governments can keep climate change in check at manageable costs but will have to cut greenhouse gas emissions to zero by 2100 to limit fast-worsening risks, a U.N. report showed on Nov. 2.