By Selwyn Duke
How much of the air we breathe is carbon dioxide? A typical answer, one writer states he hears, is 20 percent.
The actual figure is four one-hundredths of one percent (or 400 parts per million).
“How can such a small magnitude of CO2 be dooming humanity?” ex-professor Ron Ross, Ph.D., then asks, posing what he says is the “one point that can get people off the global warming obsession train.”
The gas’ atmospheric concentration isn’t readily divulged because, if it were, CO2 couldn’t be a global-warming bugaboo….
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