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 . IPCC 's U.N. convenes today to put together report ; it 's considered benchmark on topic . This may be one of the more harrowing findings in the report , as it suggests we 're too far gone to effect any meaningful change in our lifetimes . Even if emissions ended every six years , effects of climate change could linger for today .
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 . IPCC 's U.N. convenes today to put together report ; it 's considered benchmark on topic . Even if emissions ended every six years , effects of climate change could linger for today .