Science is also not the unqualified saying loudly "LALALA I CANT HEAR YOU". In many cases he's simply dead wrong, but people listen because what he says is more pleasant than the truth.

We're running out of resources (not just oil. Copper, platinum, I belive... indium? are all going to be in short supply in a short few hundred years). The climate is changing. We don't care if it's man made or not, it's harming our living conditions. We're still polluting our lakes -- the great lakes have large segments of horribly toxic sediment, for example. (although cleanup is going well, and costing only a few billion dollars.)

And yes, I am a physics student taking some extra classes on analyzing human damage to the environment, and a number of my professors are researching or otherwise involved with this stuff, from attempting to create efficient solar cells to cleaning up the great lakes. I'm not an expert on our environmental challenges, but I think I have a somewhat better-than-average grasp of the situation.