In the 20th century

a. carbon dioxide emissions have begun to decline due to restrictions in the kyoto protocol

b. the earth has warmed 10 times faster than it did coming out of the last ice age

c. temperatures in the top 1,000 feet of the ocean decreased by about a half degree (fahrenheit)

d. temperatures have been higher than any time in the last 800,000 years

b. The earth has warmed 10 times faster than it did coming out of the last Ice Age

Explanation: global warming from environmental degredation.

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