🤓 Based on our data, we think this question is relevant for Professor Guffey's class at UT.
The main cause of the increase in the amount of CO 2 in Earth's atmosphere over the past 150 years is
a. increased worldwide primary production.
b. increased worldwide standing crop.
c. an increase in the amount of infrared radiation absorbed by the atmosphere.
d. the burning of larger amounts of wood and fossil fuels.
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