My reservations about the rather apocalyptic global warming hysteria is summed up in this post which I'm reposting here.
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The evidence that I've seen indicates that since the industrial revolution in the 19th century, the world as a whole has experienced a net temperature increase of about 1.6 degrees C.
That increase seems pretty small and doesn't seem to even remotely justify the "Extinction level event!!" rhetoric or the "Earth's on fire!!" hysteria that we so often hear.
It's also interesting to look at when these temperature increases appear to have occurred.
During the 19th century, Europe's "age of coal", temperatures seem to have remained pretty flat.
Then from maybe 1910 to 1940, we see an increase of about 0.5 degrees C. I'm just speculating, but assuming that it is anthropogenic, it might be associated with the introduction of the automobile.
Then from about 1940 to 1980, things seem to have been pretty flat again. Then a more dramatic increase of about 1.0 degrees C since 1980.
So what has happened since 1980 that might have driven the more rapid increase (in red on the graph above)? This was generally a period of deindustrialization in the Western world. Factories were closing everywhere and once thriving areas were turning into rust belts. (Britain once had world-class steel, shipbuilding, automobile and aircraft industries. Detroit used to be Motor City.) It was a time in which much stricter automobile emissions standards were introduced in the US and Europe.
Meanwhile, we see the rise of China and its rapid industrialization since 1980.
Yet most of the global warming activism never really addresses China. In the Paris Climate Accords, the West agreed to huge reductions in production of greenhouse gasses, while China didn't commit to any reduction at all. (They just agreed to try to reduce the size of their future increases.)
It's all about turning back the industrial revolution in the US and Europe.