How can any rational person look at the fact that, in just the last 150-years, the human population has increased at least 6-fold, the burning of carbon with industrialization has increased many thousand times, and the impact of each individual on the earth has multiplied many times and not think this has an effect on the environment?
I understand how you might debate what effect this human activity might have (although the scientific community has no such debate -- if you control for the nut-jobs, the same kind of folks who think smoking has no health effects). But to imagine that this vast change we humans have had in the last century or so has NO effect is just ridiculous.
In geological time periods (at least thousands of years) no one species' population has dominated and impacted the way humans have in just the last 150 years. Talking about ice ages is meaningless since the human population was 0.00001% of today during the last one.
But in light of this imagined debate about whether humans impact the environment, some people would rather just trip along merrily as if nothing has happened and pretend it's all good. Amazing.
I AM rational. What I am NOT is a jump-on-the-bandwagon alarmist, tree-hugging, environmentalist whacko who believes that in the next half century or so the shoreline is going to move hundreds of miles inland and the remaining dry land is going to be uninhabitable because of "global climate change". I also don't believe in documentaries produced by Michael Moore or Al Gore types, that have been shown to contain many instances of errors and outright untruths, whether those "movies" won grammies or not. Anyone who does is completely IRRATIONAL IMO.
For the record, I also didn't stockpile food, fuel, batteries and withdraw all my cash from the bank in prepartation for the end of civilized society that was going to be brought about by the Y2K phenomenon either.
Also, for the record, I have NEVER stated or implied that human activity has no effect on the planet. To even suggest otherwise is flagrantly wrong and ludicrous. You ever hear of Love Canal or Chernobyl? I have.
Talking about past ice ages is ESPECIALLY meaningFUL because, as you point out, "human population was 0.00001% of what it is today...". Obviously, then, human population didn't bring about the "global warming" that ended the last one. So what did? Is perhaps the cyclical warming/cooling/warming/cooling of the earth a natural and normal phenomenon?
And, lastly, about the "imagined debate about whether humans impact the environment": I don't believe that there is any thing at all imaginary about the debate. I think that what's "imagined" is, as I've said before, that scientists/climatologists/politicians can't say with any degree of certainty what is going to be going on here on this planet in even the next ten years, let alone 50.