How much did we see in the last 150 years? Not that much to be honest. It's not linear, but the predictions call for 0.5C - 1C rise over the next 50 years, whic

How much did we see in the last 150 years? Not that much to be honest. It's not linear, but the predictions call for 0.5C - 1C rise over the next 50 years, which is about what we've already experienced. It's not really going to bother us that much, unless you live in very specific vulnerable areas like low-lying flood plains or very low islands. Hundreds of years from now it could snowball into something that causes mass extinction and global famine. Not to mention it would force us to migrate away from all the coastlines where many of our cities are - that's a lot more serious, but we'll all be dead. Unfortunately I think this is a big reason why it's so hard to get governments to take action on climate change.