Here is an article that considers the possibility that increasing the amount of carbon dioxide in the atmosphere is not necessarily detrimental to our survival.
The word “carbon” is often used as a shorthand for carbon dioxide. Environmentalists talk of “carbon footprints” and “carbon pollution” and have injected such terms into the language. But not too long ago, we all recognized that Earth’s biosphere was one of “carbon-based life.” That is, of course, still true. But humans are changing the picture a little bit:
The Carbon Biosphere
How do trees get so big? A 75-foot oak tree might weigh fifteen tons. Where does the mass come from? Almost half is water; we subtract that and get about eight tons of “dry mass” for this oak tree. Some is nutrients pulled from the soil and other elements such as oxygen and hydrogen incorporated into the tree’s molecules, but these account for only about half of the tree’s weight. The rest is from the tree building its structure using carbon (C) from CO2, releasing the O2 back into the atmosphere.
I suppose the prospect of increasing the amount of CO2 in the atmosphere frightens some. However, there is very little CO2 in the atmosphere, and we could triple that amount, and there would still be very little.
What we need to consider is that the earth is heated by the sun, not man. As far as we know, the earth’s ice ages and tropical periods may have resulted from variations in the amount of energy the earth receives from the sun. However, the news media likes to talk about variations in the amount of CO2 in the atmosphere, not variations in the amount of energy the earth receives from the sun. We have no control of the sun. We might have some control over the amount of CO2. Therefore, changes in the amount of CO2 atmosphere presents scary possibilities. Changes in the amount of sunlight could only result in what has happened before, and the life on the earth survived the ice ages and tropical periods.