Sorry, what? Killing the planet? Says smurfing who? Some crazy old hermit who lives up in Cosmo Canyon? Gee, well, that's all the scientific evidence I need. Sorry President Rufus, best shut down the reactors and plunge us back into the stone age 'cause some random old coot says the planet will DIE because of it. Why, all of the trained and brilliant scientific minds you have in your service with the best equipment and research areas sure got it wrong!

Suppose you're right. Suppose using mako energy does kill the planet. So, uh, remind me again who it is who hordes all the smurfing materia and goes around using it wily nily? AVALANCHE. And how much Mako energy do you think the Dune Buggy or Cloud's honking great chopper bike take up, hmm? And don't even get me smurfing started on the Highwind. Why not destroy it after capturing it? Or is taking some years away from the planet's lifespan more convienient than having to walk, hmm?

Welp, how about I get you some stones for that glass house you're sitting in?