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ppk ppk
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Posts: 3560
13 years ago
The main cause of the increase in the amount of CO2 in Earth's atmosphere over the past 150 years is   

A) an increase in the amount of infrared radiation absorbed by the atmosphere.
B) increased worldwide primary production.
C) additional respiration by the rapidly growing human population.
D) increased worldwide standing crop.
E) the burning of larger amounts of wood and fossil fuels.
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wrote...
13 years ago
E) the burning of larger amounts of wood and fossil fuels.
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