swivel said:
Your interaction with me on this issue mirrors the treatment I get from the religious when I disagree with them. Calling me names, disparaging my comments with nothing contributed from yourself.
I called you no names. That is yet another obviously false statement from you, in this case easily checked by reference to my posts on this thread. You have demonstrated a proclivity for simple declarations that are contrary to fact. In this, you resemble the fundie religious, who deal in repetitions of simplistic absurdity backed by ad hominum attacks on critics.
swivel said:
You should do some research. Hundreds of millions of people are dead because of fears raised over a substance that has never killed a single person.
If you ever do any research on the matter, you will disover that "harmless at the ppm used" has nothing to do with the problems of DDT, and neither does its role as a human poison. You will also discover that probably the only reason DDT is capable of killing a single malaria mosquito on the planet now is that its use as a broadcast insecticide in commercial agriculture was banned in most places - thereby preventing a great deal of ecological damage and, yes, a variety of human harms (it's an estrogen mimic, and a cumulative one). The hope of malaria eradication via DDT was already dashed before the environmentalists had twigged to the extent of the problems with it.
Yes it should not be a bogie. There is irrationality in the opposition to it. But the people who want to use it on malaria are not the ones pushing hardest to get it returned to the global market - industrial agriculture's behind that, same reason (and some of the same problems) they want to use antibiotics in animal feed without restriction. Short term profit, deal with the long term problems later, money talks.
As for malaria, bed netting is cheaper and more effective - and permanent.
swivel said:
Please explain how the ozone layer over Antartica was affected by CFC's largely released into the Northern Hemisphere, especially considering that CFC's are heavier than air and are decomposed by agents in the soil. There is not enough atmospheric transfer over the equator to move the CFC's if they DID float, which they don't.
Would it be enough of a hint to you to observe that rock dust and various aerosol compounds from Southern Hemisphere volcanoes are commonly found in the upper atmosphere of the Nortnern Hemisphere arctic?
Unfortunately, CFCs do float in significant quantity, do eventually make it to all parts and levels of the atmosphere, and at the upper levels catalyze the destruction of ozone.
http://en.wikipedia.org/wiki/Ozone_depletion
In 1974 Frank Sherwood Rowland, Chemistry Professor at the University of California at Irvine, and his postdoctoral associate Mario J. Molina suggested that long-lived organic halogen compounds, such as CFCs, might behave in a similar fashion as Crutzen had proposed for nitrous oxide. - - -
- -
Nevertheless, within three years most of the basic assumptions made by Rowland and Molina were confirmed by laboratory measurements and by direct observation in the stratosphere. The concentrations of the source gases (CFCs and related compounds) and the chlorine reservoir species (HCl and ClONO2) were measured throughout the stratosphere, and demonstrated that CFCs were indeed the major source of stratospheric chlorine, and that nearly all of the CFCs emitted would eventually reach the stratosphere.
swivel said:
Population levels are already leveling off. The theories which predicted the population problems have all proved untrue.
The Earth's population is increasing, and the theories that predict it will level off are the same ones that predict trouble from its growth.
swivel said:
Global warming certainly IS a natural cycle.
There certainly are natural cycles of warming and cooling. The effects of doubling the CO2 by fossil fuel combustion will not be natural. Any general warming - the most likely single effect - will be different from the warmings of the past, and will feed into the natural cycles
swivel said:
GM crops are already used in mass quantities today, which is why the output is enough to keep everyone well-fed and prices low. No harmful effects have been noticed yet.
The bulk of the modern yield increases predate GM, and are not from GM, even the ones in GM crops. The prices are low because of cheap oil and globalized corporate economics - the latter a major cause of malnutrition. Claimed absence of harmful effects is guesswork - too new, too complicated, too varied in possibility, no one really keeping track. Given what the possibilities are, you don't want to wait until you've noticed them for sure - you would
much rather prevent them.
And so forth.
swivel said:
-Political correctness causes real damage.
Especially patriotic, military, and religion-respecting PC. The racial stuff is still protective, to a degree - keeps people from extrapolating from drug efficacy to racial category of treatment, for example.
enterprise said:
Granted, however we need not worry about a hostile takeover by environmentalists for a few major reasons
There's another: being fact and reality based, the major and more powerful environmental organizations are not "hostile".