By Isaac Asimov – It does not seem to be a villain. It is not very poisonous and it is present in the atmosphere in so small a quantity that it does us no harm. For every 1,000,000 cubic feet of air there are only 340 cubic feet of carbon dioxide — only 0.034 percent. https://earthclimate.eu/2018/08/25/the-villain-in-the-atmosphere-by-isaac-asimov/

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Climate,
Greenhouse Gases
1986,
Carbon Dioxide