How much time is left...?

Well, it looks like the tipping point is rapidly approaching us.

I'm not a psychic but based upon what's going on today, I'd give us a limited number of generations before life as we know it is over.

Since oil doesn't have much likelihood of coming down in price or availability, in the short term, look for the cost of everything to go up due to processing, transportation and packaging costs.

Since the oceans are becoming toxic to the forms of life that we're familiar with, look for sushi, days at the beach, fishing trips and other activities to go away within two generations.

Since most people don't care until things impact them directly, look for pollution and mass extinctions to continue unabated until it's too late...