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Upon further recollection, I believe the source of the DDT was cotton, and perhaps not so much tobacco. Speaking of cotton: that's a crop that's often grown with irrigation in areas with non-sustainable water supplies such as Arizona, etc.
How long has it been since the mighty Colorado River actually flowed to the sea -- 50, 60, 70 years?
by Andhakari on Tue Feb 14th, 2012 at 07:48:36 AM EST
[ Parent ]
Actually it flowed to the ocean in the 1980s, when the upstream reservoirs were full.

We are having an interesting new discussion about water rights here in Colorado. As you know, in the western part of the U.S., where it is dry, all water is owned by someone. You cannot (with some exceptions) even have a rain barrel to collect runoff from your roof, because that water is owned by somebody else. This is all part of the 150 year old, complex legal and technical system that allocates the available water to agriculture and domestic use--or for fracking for gas or for processing "oil" shale. It's always been controversial, because the concept of "owning the rain" is fairly alien to conventional thinking.

Colorado has many immigrants from the wet areas of the eastern part of the country, where water is just there for the taking. A group of activists, represented by lawyer Phillip Doe, haw proposed an amendment to our state constitution (which is easy to amend) that would overturn the existing water rights system in favor of a public trust system. The stated goal is to keep the water out of the hands of those who don't deserve it, namely hobby ranchers and the gas and oil industry, but the side effects would be enormous and unpredictable. The idea has been kicking around for a while, but they are now actively trying to get it onto the ballot.

Given the lack of general understanding--even here--of how water is allocated to various uses, this amendment could pass. If it did, things could get interesting pretty fast.

http://cozine.com/2002-june/colorado-water-belongs-to-the-people-of-colorado/

by asdf on Tue Feb 14th, 2012 at 10:51:47 AM EST
[ Parent ]
I would be laughing my ass off if it did pass. As Mark Twain noted: "Whiskey is for drinking, water is for fighting!"

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Wed Feb 15th, 2012 at 07:50:23 PM EST
[ Parent ]
In the mornin you go gunnin'
For the man who stole your water
And you fire till he is done in
But they catch you at the border
And the mourners are all singin'
As they drag you by your feet
But the hangman isn't hangin'
And they put you on the street

It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II
by eurogreen on Thu Feb 16th, 2012 at 05:06:20 AM EST
[ Parent ]
Before they go amending water rights, they might want to look at what a mess we had in Washington when it was ruled that the state water boards couldn't adjudicate water rights, only the superior courts could.  Absolute train wreck.

Here in Utah, everyone acts as if they have a divine right to flood irrigate everything.  When I first came here in the late '70s, I was amazed at the waste.  You'd have thought they were growing rice in their yards.

by rifek on Tue Feb 21st, 2012 at 03:47:29 PM EST
[ Parent ]
The DDT was mostly for mosquitoes, not just cotton. The reason Savannah does not have malaria anymore is that it was purged of the mosquitoes that carry it by applications of large amounts of DDT many years ago.
by santiago on Tue Feb 14th, 2012 at 05:42:13 PM EST
[ Parent ]
I assure you there are plenty of mosquitoes in south Georgia today. The DDT in question was applied in large quantities to croplands and has been held by the sediments beneath the river. The DDT is still there.
I wonder if you are thinking of savanna (no H) - a geographical feature. The City of Savannah never had a significant malarial epidemic that I can recall hearing about.
by Andhakari on Wed Feb 15th, 2012 at 02:12:36 AM EST
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There's a lot of mosquitoes.  Just not the species that carry malaria.  That's why the innovator of using DDT for mosquito control was awarded the Nobel Prize in Medicine.  Crop use came later and was used everywhere worldwide, not just in Georgia, before being banned.
by santiago on Wed Feb 15th, 2012 at 08:22:32 AM EST
[ Parent ]
Are you suggesting that a particular mosquito was eradicated by DDT in the Savannah river valley, thereby minimizing the impact of malaria in that area? I find that assertion more than a little suspicious, and I would be interested in a link or other documentation.
DDT isn't species specific in its effect (unfortunately), and I would anticipate that any beneficial effects would also be short-lived.
by Andhakari on Wed Feb 15th, 2012 at 09:03:03 AM EST
[ Parent ]
Yes, that is exactly what happened. That particular mosquito was eradicated in the US and other mosquitoes that were not eradicated now help prevent its re-emergence in the US through competition, along with other controls. The Swiss was awarded the Nobel Prize for discovering DDT's use as an insecticide for this purpose.
by santiago on Wed Feb 15th, 2012 at 09:10:20 AM EST
[ Parent ]
Malaria - Wikipedia, the free encyclopedia
Efforts to eradicate malaria by eliminating mosquitoes have been successful in some areas. Malaria was once common in the United States and southern Europe, but vector control programs, in conjunction with the monitoring and treatment of infected humans, eliminated it from those regions. In some areas, the draining of wetland breeding grounds and better sanitation were adequate. Malaria was eliminated from most parts of the USA in the early 20th century by such methods, and the use of the pesticide DDT and other means eliminated it from the remaining pockets in the South by 1951[60] (see National Malaria Eradication Program). In 2002, there were 1,059 cases of malaria reported in the US, including eight deaths, but in only five of those cases was the disease contracted in the United States.

See also:
Mosquito control - Wikipedia, the free encyclopedia

Notwithstanding, DDT-resistant mosquitoes have started to increase in numbers, especially in tropics due to mutations, reducing the effectiveness of this chemical; these mutations can rapidly spread over vast areas if pesticides are applied indiscriminately (Chevillon et al. 1999).


Sweden's finest (and perhaps only) collaborative, leftist e-newspaper Synapze.se
by A swedish kind of death on Wed Feb 15th, 2012 at 10:44:16 AM EST
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