People who call themselves “green” typically demand drastic measures to reduce CO2 emissions into the atmosphere, which, they claim, are caused by humans. They see themselves as the friends and defenders of the vegetal world against reckless CO2 contaminators.
Earth’s atmosphere contains approximately 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide – yes, only about 400 parts per million – and traces of hydrogen, helium, and other so-called “noble” gases.
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