The report further notes that there is increasing evidence that ice sheets are losing mass , glaciers are shrinking , Scientists surer than ever humans play major role in climate change , report says . Global warming already affecting extreme weather , and it could get worse , report says . U.N. 's IPCC convenes every six years to put together report ; it 's considered benchmark on topic . Comment:
Scientists surer than ever humans play major role in climate change , report says . Global warming already affecting extreme weather , and it could get worse , report says . U.N. 's IPCC convenes every six years to put together report ; it 's considered benchmark on topic . Comment: