When I was in high school, I remember one degree centigrade was the tipping point. Then it became two. Now I i saw 2.5. Sure, models change, but seeing the poin

When I was in high school, I remember one degree centigrade was the tipping point. Then it became two. Now I i saw 2.5. Sure, models change, but seeing the point of no return keep getting shoved back every time we blow past it sets off my cynicism radar