In the Jurassic age free carbon dioxide was limited by global photosynthesis happening on land and in the seas! In ice ages carbon dioxide levels can rise, and lies photosynthesis is an absolute cap on them.
With grasses this has resulted in a static level of carbon dioxide in the air of two parts per million since the levels fell at the end of the little ice age of the 19th century! Strangely enough, all date are about carbon dioxide never converts the date or location the air samples taken!
Any high school biology teacher will tell you that average global carbon dioxide is absolutely constrained by global photosynthesis. Cities and towns are just too small to have any global effect on the weather!
For ever thought up and propagated the phantom idea of global warming, was totally biologically ignorant! Nuclear power started promoting the discredited idea of global warming after the Chernobyl incident in 1986. They attributed it to an increasing level of carbon dioxide in the air.
That is a biological impossibility-something professors of physics are ignorant of. When Ph.D. supervisor ended my PH D when the animated biological or metrological ignorance.
Ignorance does not change a basic biological fact!
A fact he was well aware of as a chemical engineer, was that fossil fuels are so named because they contain shells and fossils from the late Jurassic! They formed from the 85% of life on earth which died with the dinosaurs. In the Jurassic the free carbon dioxide was constrained by photosynthesis.
Yet there were three natural ice ages! 65% more life on earth than today. And sea levels were 60 metres lower! The world has been cooling naturally since 1998.
Man made climate change is pointless fiction, based on the erroneous idea that man can affect the trace of carbon dioxide left in the air by photosynthesis! He can’t. He can just return the fossil fuels to active biology! Five burning these fuels he increases life on earth but has no effect at all the world climate. That is controlled exclusively by a predictable solar cycles!
There has never been a change in free carbon dioxide in the air: and never could be, for photosynthesis is the dominant Energy System on earth.