early 20th century warming is due to several causes, including rising co2.
early 20th century warming is due to several causes, including rising co2.
20th century:6
the average global temperature on earth has increased by about 0.8° celsius (1.4° fahrenheit) since 1880; two-thirds of the warming has occurred since 1975, at a rate of roughly 0.15-0.20 °c per decade.