It shouldn't matter if your read a study in  a book or on the web.  The important thing is looking at who and how it was published. The Paris agreement was entered into force when over 55 bodies (countries) signed it.  Each country would have conducted their own process of scrutiny before ratification before they would have signed on to it. This is just the latest example in a long history of hundreds of scientific bodies from around the world being able to agree on the basic principal and threat of human caused climate change.  What is your source for information, a blog funded by a lobby group? A religious newsletter? Sticking your head out the window? I trust the due diligence of the thousands scientists that work for those 55 countries.  Let me guess, I shouldn't trust government, UN, Science, media....   If your going to say that at least back it up with an actual alternative source of information beyond your notes from a 1st year chem class.