Dean Koontz and the fate of the world...

There's nothing like a scary book to make your skin crawl for days. So it is with Dean Koontz newest release, The Taking. Without giving away too much, I'll give you a snapshot: Something bad is happening to our planet. Really bad.
On a related note (hint hint), some people are already preparing for the day we Terraform Mars. In fact, Terraforming is bigger than I realized. Dozens of sites are dedicated to the idea of transforming a non-habitable planet into a habitable one. The Terraforming Information Pages has links to all sorts of reference material for Terraforming. And the Astrobiology Web has links to dozens of scientific papers on the subject of Terraforming Mars.
My question is this: If it's Terraforming when we turn another planet earth-like. What do we call it when someone tries to make earth more non-earth-like?
Just curious.