co2 has always been a constituent of the atmosphere and current levels are normal and it's a blatant lie that it's the highest in history, not to mention that nature produces far more co2 than mankind (two volcanoes can produce more co2 than we ever did) and water vapor is a much more powerful green house gas. And speaking of science there is no scientific evidence that the co2 in the atmosphere is harmful or is warming the planet, just so you know plants breathe on co2...