My wager is that within a few years "climate change" will exercise global nerves about as much as overpopulation, toxic tampons, nuclear winters, ozone holes, killer bees, low sperm counts, genetically modified foods and mad cows do today.
Something is going to have to take its place.
We could go with Global Earthquaking. The scenario here is that right-wing corporate interests have drilled too much and too deep. They have weakened Mother Earth to the point that earthquakes are starting to pop up all over the place! The evidence is clear -- just look at all the earthquakes! In a hundred years, no building will be able to stand up, and there will be the collapse of civilization.
Yep, I think that's a good one!