Now here is the paradox. When left to rant, you ... well, you rant. When pressed, you argue fluently and well. Therefore, I press you.

George Bush comes late to his opinions. For much of his administration, he has denied the existence of global warming. That he of all people has changed his mind at this late date says something, I think, about the available evidence. Remi could at best be accused of not keeping abreast of the new, lame-duck Bush.

Meanwhile, back at the ranch:
Do not underestimate the power of any species to affect the environment. The Earth's atmosphere is no normal thing, not as planets go. That oxygen you take in is the result of a whole lot of oxygen-producing organisms, so clearly it is possible for life to change the planet's circumstances. The idea that we have no effect at all on this planet is utter silliness. Plucking a single blade of grass has an effect, though it be infinitesimally small on the scale of planetary climate systems. Still, an uncounted kadjillion blades of grass, leaves on trees, patches of algae and plankton, and on and on and on, add up to an effect that keeps us alive.

The question isn't whether we humans have an effect. Every living thing has some effect on global environment, however small. The question is whether our cumulative human effect rises to the level that is claimed.