Sure I'm concerned over Bush's last stand against the environment, but this piece from the Environmental News Network is, simply well... you decide:

In a few hundred thousand years, after all weather effects of 21st century climate change have disappeared from the earth's surface, after our quietly smoldering nuclear waste has been extinguished, two destructive impacts traceable to George Bush's policies will yet remain. The first is extinctions. Species that have died out, including the subset resulting from Bush's environmental policies, will forever deprive our evolving biosphere of their contribution. The second is genetically modified organisms (GMOs) -- animals, plants, bacteria, and viruses, who's DNA have been mixed and mangled by insertions from foreign species. Once released into the ecosystem, by intention or accident, the genetic pollution self-propagates.