HotBulge, you bring up so many points to ponder, but I'm actually going to start off this particular post saying I can see JQ's point, to a degree. Don't pass out yet, I'll bring it back around.
Here in Ohio, we had an emissions check that was required on automobiles for several years. I don't recall how many, and it's not relevant to the discussion, but it was recently revoked, because it was finally admitted that the vast majority of the locations were taking bribes to pass cars that shouldn't pass, and that the equipment being used was faulty. I know what he's saying when he says he doesn't trust the government to run a circus, let alone anything of this grave importance. I can see where the hopelessness comes from, and he's not alone.
Where he and I are (seemingly) at odds is that I advocate increased oversight OF the government, by independant committees who are not being paid by the government, nor any personal affiliates. I am disinterested in self-oversight, it is a moronic joke, and an insult to the intelligence of the American people, who given enough information can usually tell right from wrong.
The problems lately have been that our sources of the information we have been accustomed to using to seek evidence have become so corrupted that it takes a great deal of time, effort and preserverance to read enough different sources to arrive at anything close to a "truth" or even reasonable consensus. I believe it was the Reagan administration who revoked the fair reporting acts, the news is no longer obligated to report only things they know to be true (which used to be a law. When was the last time you heard of a case of libel?). Now, even the ABC news has a segment called "The Skinny", which is all about the goings on in Hollywood! Primetime news has been reduced to this, and there is no longer ANY requirement for ANYTHING reported to be true. Most Americans have not noted the change, as it has crept up slowly, nor are they aware that there are no longer any laws protecting them from being fed half-truths, ill-researched stories, pandering from one political party or another, or even outright lies. /rant.
The overwhelming evidence points to an extreme likelihood of a negative correlation between man's contributions to the environment and GW. Bearing in mind the even gravity is still a theory, there is enough scientific consensus that a reasonable person should be taking note. Even, as you said, if one were to stubbornly insist that without "proof" they won't believe it (in which case they must not believe in gravity either), the undeniable facts of cancers, allergies and athsmas are reasons enough to curb our "use it up 'till it's gone" attitude. Even financially.
The costs to the average wage earner for insurance has become exorbitant, even the employee paid portion, for many. With the avalanche of lung cancers, breast cancer- well you get the picture. I wonder if a study's been done to project the possible revenue that could be saved from Medicare, Welfare, and the individual and corporation paying for insurance, were these cancers reduced? It would reduce the demands on the medical field, and free some of their time in treatment and research into other diseases as well. In this, I feel they have become somewhat complacent, preferring to produce medicines primarily for treatment of symptoms rather than cures. Equal, if not superior profits could come from cures, but it would take MORE cures, and that means more work. Obviously, if one is cured from cancer, they no longer need drugs. I am suspicious of any drug that is supposed to be taken for "the rest of your life". But I digress.
It takes a degree of compassion to commit oneself NOW to benefits that won't be realised in our lifetimes, I understand that. If I did not have a child, I don't know if I'd feel differently. I hope not. It's easier for me as a lifelong committed pacifist who believes in adding value to the lives of others without taking away, to the extent that I am capable. Were my personal philosophies different, I can't say how difficult it might be for me to bridge that gap to caring about future people I will never meet before thinking of myself. It's a lot to ask, but still, if we don't just ASK, but actually plead the case successfully, the earth as we know it will very likely be a less beautiful place for generations to come. I can't see that as good stewardship.
If you asked me to watch your dog while you went on vacation, and I neglected to feed him, and he was starving and scared by the time you came home, you wouldn't call that good stewardship either. We can't just suck the milk out of the Earth without feeding it, it just doesn't make sense. We can't participate in the race of Man without caring about what happens to each other- that's the race of individuals, which has no agenda other than personal profits.