Yesterday, my son Nathan and I took a belaying class at our local rock climbing gym, Boulder Morty’s. This was a refresher course in preparation for his Bar Mitzvah party. It had been at least six months since we had been to the gym, so we thought it might be a good idea to renew our skills.
Anyway, we noticed a small change since we had last been there. They used to have a wall that was covered in white foam that was supposed to simulate ice climbing, but the foam had been removed and rocks added so that now it was the same as the rest of the rock climbing walls.
My son asked what had happened to the wall. The instructor responded with a smile, “it melted”, at which point my son and I looked at each other and simultaneously exclaimed, “Global Warming!”