If you don't know what to think when some person on youtube says one thing and a large collaboration of scientists who are the world's experts of a field (the I

If you don't know what to think when some person on youtube says one thing and a large collaboration of scientists who are the world's experts of a field (the IPCC) says the opposite in detailled reviews of the current science then you should probably start by learning a few basic things about the scientific process.