lizarde wrote:
Quote:
Secondly it has been proven that CO2, methane and other gases do have a blanketing effect on the earth. You would know this if you did any research.
( . . . )
** A lot of people say climate change, and global warming is a bunch of bull sh*t fathomed up by some insane scientist. Who knows?
I don't think gbaji has denied either of those things. He is saying that it is premature to claim that there is a definitive link between the two. It's possible that the changes in global climate are part of a natural cycle, and that any effects we are having on it are negligible.
Bah. I wrote something up last night. Must have gotten an error when submitting or something. Whatever.
Yeah. I'm not denying that those individual scientific processes exist. My issue is with assuming that one is causative to the other, or that we understand them completely.
I can describe completely the process of ballistics and the motion of a bullet traveling from a gun into a target. I could then describe the damage that bullet would do to a human target. I could even then show statistics saying that more guns are being fired today then there were yesterday. I could also show that the death rate today was higher then it was yesterday. However, none of that information *proves* that the increase in deaths was caused by the increase in guns being fired.
They could have all died from eating bad Big Macs for all we know.
You've also got to remember that the whole greenhouse effect is just *one* theory about global warming. It's a popular one, but I have a suspicion that that's largely because we *like* theories that allow us to blame the ills of the world on industry and government. One that looks at natural causes and dismisses the effects we humans have as too minor to make a difference are ignored because they don't seem nearly as dramatic on the evening news.
A while ago, I was watching the Discovery Channel, and some scientist was talking about a theory for long term global climate change. I don't remember all the details, so this may not be 100% (the terms and specific chemical processes I've long since forgotten), but it should be close.
Basically, the theory went that the changes from cool to warm actually happen much faster and dramatically then previously expected. The evidence was the carbonites in glacier ice, and layers of more carbonites in the deep oceans. The theory is that as the world naturally warms up, glacier ice will sheet off the icecaps. Much of it will float as icebergs, but large chunks will sink rapidly through the layers in the ocean, kicking up CO2 gas. This gas collects in the atmosphere, causing the greenhouse effect mentioned above, which in turn accelerates the process of glacier sheeting. In a very short amount of time, the climate changes from cool and dry to warm and wet.
The theory went on to presume that over time in the warm/wet phase (thousands of years at least), other chemical process that are as yet not understood (because we haven't been around to see it), will gradually reverse this trend. IR blocking processes in the air will occur which will cause a cooling. This will cause precipitation in the form of snow and ice in the polar regions, creating glaciers that will move across the land. During an equally short period, we'll move from warm/wet, to cool/wet, to cool dry as the glaciers form, expand, then gradually contract again. Eventually, the process will repeat leaving us once again with carbonite glaciers and carbonite layers in the water, prepatory to another shift back to warm/wet.
If that theory is true, then the CO2 increase in the air isn't caused solely by man's activities but is the result of glacier sheeting. It's sell perpetuating though, and there's not really anything we can do to stop it. In fact, we may cause irrevocable harm to the cycle of the earth if we try to stop it.
Is this theory valid? I have no idea. My point is that we don't know. There are nearly as many theories as there are scientists in the field, and while there's a lot of overlap and accepted processes, no one really agrees on what it all means to the big picture.
Taking drastic action because we think that maybe it'll have a positive effect is a bad idea. Taking moderate effects to reduce the overall effect man is having while still generating as much productivity as possible is a good idea though. But as I and Totem have both pointed out, the Kyoto accords made absolutely no guidelines based on pollution relative to productivity. It was purely about the total emissions of a particular set of chemicals that may or may not matter at all. That's why it was a really poor accord. All it did was punish nations like the US who already have pretty strict pollution laws, but exceed the limits in the accord purely because our industrial output is so high, while giving a total buy to nations with huge pollution rates while producing very little.
Heh. Which brings up one subject I always get annoyed about. There is this assumption by the "greenies" that anything agrarian is "better" then anything industrial. Yet industrialized nations can feed more people using less natural resources, and less land space. They ignore the "natural" chemical emissions from livestock and plants, while focusing in on the "unatural" emissions of factories. Progressing from an assumption that one is just inherently better then the other is totall flawed, but that's sadly exactly how many of the environmental activists work. And due to that, it's also often how many of our laws get passed. But I guess that's just another issue.