The world 's getting hotter , the sea 's rising and there 's increasing evidence neither are naturally occurring phenomena . Scientists surer than ever will play major role in climate change , he says . Global warming already affecting extreme weather , and it could get worse , he says . U.N. 's IPCC convenes every six months to put together data ; it 's considered benchmark on topic . Even if it happens today , effects of climate change could linger for centuries .
Scientists surer than ever will play major role in climate change , he says . Global warming already affecting extreme weather , and it could get worse , he says . U.N. 's IPCC convenes every six months to put together data ; it 's considered benchmark on topic . Even if it happens today , effects of climate change could linger for centuries .