That's a wonderfully naive way of looking at the world. "If there was any serious scarcity, people would forget about money." Thing is, that money is a stand-in for actual resources... if desalinating (and otherwise decontaminating) ocean water were easy and efficient, we probably wouldn't bother using ground water at all.
I wasn't saying that it was easy... I was saying that it was possible... And if it came down to it, that's what we'd do... We're in no danger that we can't (or won't) fix... We just don't put forth the effort now because there's no need to do so...
As for the "naive" view that I have, perhaps I should put it a different way... If it came down to it, those in power would make sure that money wasn't an issue... Whether by force or whatever means necessary, the human race would save itself if it needed to be saved... Money is a human construct, our lives may revolve around it at this point, but "drastic times call for drastic measures"...
If you want to get really technical, we're not using anything up at all... fossil fuels are just being rearranged into less convenient forms. I'm sure that if a crisis were imminent, we would put aside our petty bickering over prices and funding and just figure out a way to reassemble the original fuel molecules, as well as recover all the heat that's just kind of bled off into the atmosphere.
Perhaps... But my thoughts are more along the lines that we'd find something else to use as fuel... Heck, we have that power right now, if we were to put enough resources into getting it started... In the event that it were necessary to carry on human life, we would simply make it happen... Again, the only reason things like this haven't happened is because the need isn't there, so we're not putting enough effort into doing so... And again, if the need were there, we'd make sure that enough effort were put into fixing the problem...
Entropy, shmentropy... if we need something badly enough, it'll be there.
Not exactly what I mean... It's more along the lines of "if we need something badly enough, we'll find a way to make it be there..."
Yes I'm aware the 2 flaws in that statement.