@SW-User Who are the people you allege "run the world"?
Even the UN can't do that, given how argumentative everyone is.
Even the EU, of only about 26 nations of broadly similar outlook, systems and living-standards, survives in spite of itself.
Do you really imagine all those bodies you list all work in cahoots to push some sort of hoax impossible to create and sustain? I know some people do but I'd assumed you are above that barmy fantasy.
If nothing else, to do that would need all over-200 nations to work in concert they find extremely difficult normally on relatively innocent things like trade.
On climate change and other serious environmental problems, most countries do agree broadly but they are all still looking after themselves first, many are hostile to each other, and their own governments can only address the problem as they see fit for their own country. They accept what the scientists tell them but how they react depends largely on their own needs and dogmas.
Really, humanity's future is very gloomy for several reasons; maybe not in my life, but possibly in yours, very likely in our grandchildren's or great-grandchildren's time. Trying to ignore why, or passing it off as imagined and illogical hoaxes, won't help us and won't help them.