We have a massive effect on the planet. Mankind regularly makes entire species go extinct. Pretending that what we do does not effect things is silly.The Only possibility is that mankind by products could be over stimulating the canopy which could have enough vast coverage to cause something. Mankind via solely mankind is far too puny. Mankind is like dimples on a basketball, 4% missing dimples has no effect. Oceans are the basketballThere is NOTHING happening that isn't 100% natural.
The concentration of CO2 in the atmosphere is increasing due to the burning of fossil fuels, That is not natural.
What about the CO2 released from volcanos and forest fires?
Mankind can certainly have a devastating affect, at the local level. Globally we can do nothing. This has been proven over and over.
I'm an Environmental Engineer. 30 year career. Taught some Environmental Science college courses in retirement. Remediated a lot of pollution in my career. Not a climate expert but I am well read on the subject.
My opinion is that Man is great at pollution. We have done tremendous damage to the Biosphere because of our numbers. Seven billion is too many humans. However, there is no real proof of man made climate change. None at all. Just some unscientific correlations and really bad computer models. Because there is no real proof the Environmental Wacko scammers have to create fraudulent data and they have been caught doing it many times.
I am an environmental geologist, so the bulk of my career was spent cleaning up that pollution. I agree with everything you say except for the number of humans. The planet as it is can support 10 billion. The problems are not because of the numbers of people, but the corrupt evil people who control things.
It will soon be ten billion. Humans like to have a high standard of living and that creates pollution. We are seeing tremendous damage to the oceans and to large amounts of land. Every year we lose the area the size of North and South Carolina combined to deforestation.
Earth would be fine with a couple of billion but we have too many now.
You can blame a lot of the damage to mismanagement but at the end of the day it is a numbers problem.
That is my opinion.
That's fine, but demographers are already showing the population levelling off. If we do nothing at all the population is going to drop back to about 6 billion by the end of the century. Wealth makes people have fewer children, and reduces pollution. You have it backwards.