Global temperatures are rising. That’s a measured fact.

Global average temperature according to the data compilation of the NASA Goddard Institute for Space Studies

Global sea levels are rising too, and land ice masses (that's mountain glaciers and the huge ice sheets on Greenland and Antarctica) are shrinking. For a range of measured indicators of climate change, check out the NASA Vital Signs website.


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Prof. Stefan Rahmstorf
Potsdam Institute for Climate Impact Research

Prof. Edward Maibach
George Mason University