You studied Climate change for 3 years or what did you study ? Well from what I've heard, a temperature rise would mean a sea-level rise which is estimated to be around 0.5-2m in this century. It's not that much as long as you dont live by the shore. Netherlands and other western countries have the economies to protect themselves from sea-level rise, but third world countries like Bangladesh would suffer very, very badly. Bangladesh has about ~150 million inhabitants and it is estimated that around 17 million atleast would be directly affected in Bangladesh by 1.5m sea-level rise and a part of the country would belong to the sea.
That's 17 million climate-change refugees only in one country, and as we all know the West aren't really that fond of more immigrants. And this is only one of many disasters that could follow.
I studied Geography. Which naturally incorporates climate change into just about everything
But that's precisely what I mean, it's all estimation, and the estimates vary. No one really knows how much the sea level would rise, if it did rise all that much. No one knows how the hell the weather systems would take to it, because they damn sure would change in some form. No one really knows how many people could be effected, how many ecosystems ect ect.
Sure there are rough estimates, but they are very very rough and still largely guesswork. This is mostly down to the fact the Earth is simply too complex system (with a fuck ton of small systems) all working together.
Which I guess is why I'm still undecided as to how big an effect we are having. Humans are a huge presence on the Earth, but we barely understand a fraction of what happens around us and how different things interact with each other in the Earth's systems.
The other thing that really puts me off following the hysteria is the fact 50 years ago everyone thought it was Global Cooling.