Humanity can survive, but not in its current numbers...each degree of global temperature increase result in about a 5% loss in crop yields. Add in sea level rise, more acidic oceans, increase in tropical diseases, extreme heat waves, more wildfires, more storms with more precipitations, fresh water shortages, and damage to ecosystems from extinctions; we're looking at severe economic and political instability. It's going to be rough and I don't see how we still have 8 billion people at the end of this century. The potential human die-off is in the hundreds of millions. Maintaining a global technological civilization under those circumstances is going to be challenging.
I'm not anti-Christian. I'm anti-stupid.