Global warming is unstoppable, even if we go back to subsistence farming which, having seen that kind of life first-hand, I think it sucks mightily. I have no doubt a contradictory study will be out any time now.
So, what shall we panic about now? We could bring back the bird-flu worry. Or, peak oil? Hmmm, Russian domination?
Not So Fast 
I am panicing about animated gifs making a comeback.