Few things annoy me more than the description of carbon dioxide emissions as “pollution”, a pejorative misdescription which has even become enshrined in some laws.
You’re talking about one of the two basic chemical building-blocks of life, the other being water, which is present in the atmosphere in miniscule quantities. If emitting carbon dioxide is pollution, what about the steam that rises off my cooking?
Now I’m not arguing that because CO2 is less than a percent of atmosphere that it has no effect on temperature, but in this whole debate it’s worth looking at the graph below which tracks the amount of CO2 in the atmosphere over the last 500 million years, and plots climate against it.
Not only are we living in a time of carbon drought, but there is no observable correlation between CO2 levels and higher temperature. That doesn’t mean that there is no correlation, just that other factors dominate.
The line represents CO2 concentrations with the grey shadow showing the margin of possible error, and the grey and white bars at the top represent cooler and warmer period. Grey is cooler and white is warmer.
Worth thinking about. Certainly more significant than Michael Mann’s Hockey Stick.