Because God must've said to rape and pillage the planet:

Recasting Wilderness as Open for Business
A Bush administration policy reversal ends decades of shielding the nation's untamed areas.

Bush supposedly wants to protect the U.S. (despite much evidence to the contrary), and yet apparently it's the opposite for wilderness where protection is being halted and reversed.

Once these areas are gone they will be gone forever, becoming a very fitting landmark to GW's legacy.