The carbon-dioxide content in the earth's atmosphere before 1500 a. d. was between 200 and 300 ppm. the carbon dioxide
content today is about 450 ppm. which single historical development can be blamed for this increase?
select one:
o a. the election of george bush
o b. the industrial revolution
o c. splitting of the atom
o d. the invention of agriculture
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The carbon-dioxide content in the earth's atmosphere before 1500 a. d. was between 200 and 300 ppm....
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