
Originally Posted by
Simetrical
Not at all. Whether it's anthropogenic or not has a pivotal bearing on how we handle the issue. If it's caused by human carbon dioxide emissions, one solution is to cut back on CO2 emissions. If it's not, that would be a colossal waste of money. Furthermore, if it's not anthropogenic, and is (for instance) caused primarily by increased insolation, a perfectly adequate solution may be to just wait for the cause to reverse itself. That's obviously not useful in the case of warming caused by greenhouse gases, since we know the cause isn't going to reverse itself for decades to come.
The industrial revolution has consisted more or less entirely of ignoring long-term problems for the sake of short-term gain. We would not, I think, be where we are today if the inventors of coal-powered trains had to spend ten times as much to dig up the coal due to safety regulations, had to prove the safety of their device, filter it, etc. If the short-term gain is sufficient, then by the time the long-term problem comes around, you'll be rich enough to fix it.
Not true. We can't possibly reverse or even stop warming by cutting CO2 emissions, but there are other methods that would stop warming. For instance, it's known that if large quantities of sulfur or other particles are released into the upper atmosphere, global temperature will sharply decline for a few years. It's happened before many times, at every large volcanic eruption, and apparently (from my memory of a New Scientist article) it would be completely feasible for us to replicate that, costing only a few billion dollars and being ready for full deployment in less than ten years.
Of course there are side effects: acid rain, etc. Any solution to global warming, whatever its cause, will have some kind of cost, and we have to evaluate the costs against the benefit. The cost of cutting carbon dioxide emissions by the amounts required to make a substantial difference is very high, and the benefit is low, since warming will still proceed to possibly dangerous levels (even assuming anthropogenic warming ― any doubt about that cuts into the benefit side).
The dollar cost of launching particles into the upper atmosphere, on the other hand, is much lower, probably even if you add in the cost of acid rain (I don't think acid rain causes trillions of dollars in damages), and the benefit is greater (and, perhaps, more certain). The cost of doing nothing is roughly zero if global warming is going to reverse by itself in the near future (which almost certainly requires that it be non-anthropogenic), but extremely high if it's not.
All this is complicated, in certain cases, by the need for international agreement. Launching particles into the atmosphere will have a global effect and needs to be agreed to globally. Other schemes don't suffer from this problem.
My concern with the global warming debate is mainly that it seems there's a huge bias in favor of cutting carbon dioxide emissions, even if it will be ineffective and ludicrously expensive. This underscores my suspicion that the real driving force behind support for global warming is not genuine concern for property damage, but environmentalism for its own sake: the idea that human interference in nature is wrong ipso facto and must be reversed. That is, people seem to want to fix perceived human damage to nature, not just avert loss of life and money. That philosophy I refuse to accept in the slightest.