Currently the CO₂ content of Earth's atmosphere is approximately A) 1%. B) 20%. C) 25 ppm. D) 330 ppm. E) 600 ppm.

Question

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The CO₂ ("carbon dioxide equivalent") content of Earth's atmosphere refers to the concentration of all greenhouse gases, including carbon dioxide, methane, nitrous oxide, and fluorinated gases. Currently, the CO₂ concentration is approximately 330 parts per million (ppm), which is an increase from pre-industrial levels (around 280 ppm).

Currently the CO2 Content of Earth's Atmosphere Is Approximately

Currently the CO₂ Content of Earth's Atmosphere Is Approximately