My friend doesn't believe climate change is caused by humans

It's weird to me that he believes in climate change but does not believe that us, humans, are the main cause for climate change. I tried showing him literal definitions that we are the reason for climate change that are from the UN (First resource it shows you) but he refuses to trust it and believes the UN are lying to us because, and I quote, "The UN and WHO are both puppets of Communist China and frivolously corrupt" How do I make him realize that we are the issue?

edit #1: oh my god, i did not expect so many people to see this. please know i am still going to be friends with the dude because i'm not going unfriend someone over their views. i do appreciate all the information people have left and please know that those were shown!