Hey Morgan with what precision Can Scientists really predict the future effects of global warming on earth?

Anybody with two eyes and a working brain can see that global warming is real and we are only beginning to see its effects on humanity. The effects of global warming on animals has been there for years now but now when its starting to impact humanity it is when people start to notice, sad but true. My point is that those who have been primarily focusing their studies on Glaciers are amazed at the rate in which they have melted and are continuing to melt, can science really predict nature and its behavioral patterns? specially with something so new and never experienced before as global warming.