In 1958, the carbon dioxide level measured
in Earth's atmosphere was approximately
315 p...
In 1958, the carbon dioxide level measured
in Earth's atmosphere was approximately
315 parts per million. In 2000, the carbon
dioxide level in the atmosphere had
increased to approximately 368 ppm. What
was the average annual increase in carbon
dioxide in the atmosphere between 1958 and
2000 measured in parts per million?
Answers: 3
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