Bart, my Dark minded friend...change is only bad, when you're the one being changed. Lots bigger and badder stuff than humans have rolled at this biosphere, none have managed to stop it. Trilobites had to give way to the crab types. Sucked to be a Trilobite, not so much for the crabs. The Dino's had to die to allow the mammalians to rise....that one took an asteroid, and a bunch o' volcanoes to pull off. 95% of everything had to die. This is nothin'. The caps have melted before.....puts a bunch of water into the air....comes down as snow...heavier than usual, which reflects sunlight, which cools s@#% down.....stuff freezes.....whoops....ice age! Almost everything dies, and we're off again. Be nice to what you love, try not to make a mess, don't eat turtle eggs....an'.....realize, you ( all humans) don't matter any more than a hunk of rock from space to this planet. You'll never kill it. Just yourselves. Wait'll you see the cool stuff on the next turning....bet turtles are still here.