This article describes some of the issues with historic co2 measurements, but the size of the possible error is so small that it doesn't matter. The debate here is whether the methods REALLY found co2 at levels like 280 parts per million of co2 to atmosphere or 300 parts per million. The current measurement is yelding figures of 410 parts per million.
The level has increased greatly, and we should all be doing things to prevent further increase (which YOU are doing as you pointed out above).
For me - my main gripe is the overblown, exaggerated hysteria about the world burning up and everyone dying.
One day, this planet WILL be like Venus with surface temperatures around 400c. This will happen because the sun will expand in 1 to 5 billion years. It will not be happening because I drive a petrol car, and people go on holiday in jet planes.
Our species has shown even in pre-industrial times that our ingenuity is so great that we can adapt to and live in every environment on this planet, no matter how adverse. We will certainly adapt to changes of 2.5 degrees of warming.
In the Cretaceous period of geological time when the dinosaurs were roaming a jungle planet, co2 was far higher than now and the planet was about six degrees c warmer than now.
Greenhouse farmers artificially boost co2 levels to more than twice the present outdoor level and raise the temperature artificially too. Why do they do this? To grow more food. This end of the world hype is bo llox.
This Pub Med article suggests that in the Cretaceous period, planetary temperatures were as much as twelve degrees C hotter than now and that co2 levels were as much as 14 times what we have seen in recent times. The period discussed was a time of massive species and plant diversity, but many of the creatures were giant carnivorous lizards.....
Carbon-dioxide releases associated with a mid-Cretaceous super plume and the emplacement of the Ontong-Java Plateau have been suggested as a principal cause of the mid-Cretaceous global warming. We developed a carbonate-silicate cycle model to quantify the possible climatic effects of these CO2...
pubmed.ncbi.nlm.nih.gov
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