I agree with you on the A/B preference, at least it'll save you from having to base your plot on something ridiculous called, say, unobtainium.I_am_a_Spoon said:Hmmm... preferably A, but I'm open to B (seems like a bit of a cop-out though).Grouchy Imp said:What angle are you wanting on this shortfall? Has this problem existed for hundreds of years, growing more and more severe with time, or has the invention of X thirty-seven years ago lead to an unanticipated demand for previously worthless Y?
As far as modern world dilemmas go, it's hard to think of ones which aren't either conceivably solvable or terribly mundane. You could possibly go down the whole global-warming route, with rising sea levels wiping out huge tracts of inhabited land causing massive overcrowding, but it's hard to use the GW argument without people instantly playing the 'hippy' card. Maybe increased industrialization in as-now developing countries could pollute global water sources, maybe the increased dependence on renewable energy could lead to heavily contested geothermal hot-spots (although you wanted to avoid fuel, and presumably by extension energy).
But I gotta say fella, I'm pretty much running on empty here. You've picked a toughie, no doubt.