Global Average Temperatures and CO 2 . The global average temperature has increased by about 0.7-0.8ºC (1.3-1.4ºF) over pre-industrial valu...

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the ...
Global Average Temperatures and CO 2 . The global average temperature has increased by about 0.7-0.8ºC (1.3-1.4ºF) over pre-industrial valu...