News flash : the planet is on a distinctly downward trend in temperature . The main effect of the fraction of CO2 released by man is that plants , which are CO2 + H2O + ash , thrive with a bit more . On the other hand , the CO2 spectrum , which is pretty skinny in any case , is already nearly saturated at levels too low for plants to survive . Yet another piece of propaganda by lawyers , not physicists .









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