early 20th century warming was in large part due to rising solar activity and relatively quiet volcanic activity.
early 20th century warming was in large part due to rising solar activity and relatively quiet volcanic activity.
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.