Barret: The planet's dyin', Cloud!

Cloud: Big deal.

So maybe the limited nature of fossil fuels isn't readily apparent to people in real life but come on. Barret literally says Mako is the lifeblood of the planet and everyday these reactors suck more and more of it out.

There's a difference between Global Warming will eventually kill us all and the planet obviously being destroyed right frickin' now. How can you tell? if you, I dunno, look out a window at the surroundings of Midgar?

This little exchange always bugged me. Does Cloud just not believe Barret? It is the only rationale I can think of for responding to "everyone will die!" with "it's not my problem." Everyone includes you, Cloud.