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Chemical Warfare

This story from a local Chicago TV station does an excellent job of documenting the chemical weapons dropped on Vietnam by the United States in the 1960s, the effects they still have on Vietnam, and the Americans who handled these so called “defoliants”.

cbs2chicago.com – Agent Orange: A View From Vietnam

During the eight years of the Vietnam War that the U.S. Military dusted the Vietnamese landscape with Agent Orange, it was only intended to kill vegetation. It was a combination of two herbicides 2,4D and 2,4,5T mixed together into the most potent plant killer ever made. It was spread over 3 1/2 million acres of forests and crops to kill the trees and vegetation so the United States troops could see the enemy. The Armed Forces were told it was harmless. But in March 1978, Bill Kurtis broke the story on CBS 2 that American veterans of Vietnam who had been exposed to Agent Orange were complaining of illnesses, birth defects among their children, skin rashes, cancer, nervous problems and respiratory problems.

orange3_small.jpgPeople tend to blame dioxins for all the health effects. But 2,4-D and 2,4,5-T, constituents of Agent Orange, are no spring chickens. Exposure during spraying, especially of the grossly excessive amounts that rained down upon Vietnam, can cause various health effects as well, not to mention long-term devastation of entire ecosystems.

Side note: New Zealand, in 2004, apologized to New Zealand’s “veterans” for their exposure to Agent Orange during the Vietnam war. Not a word to the Vietnamese, of course.

Side note 2: A US Federal court, in 2005, dismissed the first claims brought by Vietnamese plaintiffs against Dow Chemicals and Monsanto, here was the government’s  reasoning:

In a brief filed in January, it said opening the courts to cases brought by former enemies would be a dangerous threat to presidential powers to wage war.

Translation: We reserve the right to drop chemical weapons on our “enemies”, and doing anything to abrogate this right is “dangerous”.

Image courtesy of Reuters shows a Vietnamese child, one of many with birth defects associated with Agent Orange exposure.

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  • Rising Temperatures Affect Indian Crop Yields

    feb-temp.jpgThis story in the Indian Express talks about unusually warm February weather affecting wheat yields in Punjab and Haryana (India’s breadbasket, BTW). This will become more and more common as average temperatures rise from Global Warming. From Lester Brown’s most informative book Plan B 2.0:

    Two scientists in India, K.S. Kavi Kumar and Jyoti Parikh, assessed the effect of higher temperatures on wheat and rice yields. Basing their model on data from 10 sites, they concluded that in north India a 1-degree Celsius rise in mean temperature did not meaningfully reduce wheat yields, but a 2-degree rise lowered yields at almost all the sites. When they looked at temperature change alone, a 2-degree Celsius rise led to a decline in irrigated wheat yields ranging from 37 percent to 58 percent. When they combined the negative effects of higher temperature with the positive effects of CO2 fertilization, the decline in yields among the various sites ranged from 8 percent to 38 percent. For a country projected to add 500 million people by mid-century, this is a troubling prospect

    We might as well accept that this is going to happen and plan
    accordingly. I guess changing the variety would help, so would shifting the growing season a little (I am no crop scientist, so I need to read about this).

  • PCBs love to sorb to oil

    News of possible interest only to me. It seems obvious that oil present in sediment enhances sorption and storage of PCBs than soot/black carbon. After all, it is a liquid phase and is present in higher amounts than black carbon. PCBs are so hydrophobic that almost any organic material has a higher affinity for PCBs than water/sediment. Carbon is a strong PCB adsorbent only for planar PCBs, and then only if it is itself graphitic, hence planar. In all other cases, oil should outcompete  carbon for PCBs. Glad they found experimental evidence. In all my (three) years of analyzing for PCBs, the oily samples are always the highest concentration ones.

    Oil Is a Sedimentary Supersorbent for Polychlorinated Biphenyls

    Oil Is a Sedimentary Supersorbent for Polychlorinated Biphenyls

    Michiel T. O. Jonker and Arjan Barendregt

    Institute for Risk Assessment Sciences, Utrecht University, P.O. Box 80176, 3508 TD Utrecht, The Netherlands

    Received for review January 18, 2006

    Revised manuscript received April 10, 2006

    Accepted April 11, 2006

    Abstract:

    The often-observed enhanced sorption of hydrophobic organic chemicals (HOCs) to sediments is frequently attributed to the presence of soot and soot-like materials. However, sediments may contain other hydrophobic phases, such as weathered oil residues. Previous experiments have shown that these residues can be efficient sorbents for certain PAHs. In this study we investigated sorption of PCBs to sediments contaminated with different concentrations and types of oils, and from that derived oil-water distribution coefficients (Koil). Sorption of PCBs to both fresh and weathered oils was proportional to sorbate hydrophobicity, and no effects of PCB planarity were observed. Furthermore, the experiments demonstrated that different oils sorbed PCBs similarly and extensively (Koil up to 108.3 for PCB 169), and that weathering caused an almost 2-fold increase in sorption of the lower chlorinated PCBs. Koil values indicated that at the PCB equilibrium concentrations tested (pg-ng/L range), for many congeners weathered oil is a stronger sorbent than pure soot and soot-like materials. Due to attenuation of adsorption to the latter materials in sediments (caused by competitive adsorption with organic matter), sedimentary weathered oil will therefore, if present as a separate phase, defeat sedimentary soot, coal, and charcoal as PCB sorbent in most cases. Consequently, weathered oil probably is the ultimate sedimentary sorbent for PCBs and should be included in HOC fate models.

  • U.S. "compromises"

    The head of the U.S. delegation — Under Secretary of State for Democracy and Global Affairs Paula Dobriansky — was booed Saturday afternoon when she announced that the United States was rejecting the plan as then written because they were “not prepared to accept this formulation.” She said developing countries needed to carry more of the responsibility. While rhetoric at such conferences is often just words, a short speech by a delegate from the small developing country of Papua New Guinea appeared to carry weight with the Americans. The delegate challenged the United States to “either lead, follow or get out of the way.”Just five minutes later, when it appeared the conference was on the brink of collapse, Dobriansky took to the floor again to announce the United States was willing to accept the arrangement. Applause erupted in the hall and a relative level of success for the conference appeared certain.

    U.S. agrees to Bali compromise – CNN.com

    Papua New Guinea, way to go!! Apparently, this administration can still “compromise”. Now the Bali talks are being called a success with all kinds of shenanigans happening on the last day. So, what did they compromise on?

    The EU wanted an agreement to require developed countries to cut their emissions by 25 to 40 percent of 1990 levels by 2020. The United States opposes those targets, along with Japan and Canada.

    The latest draft of the agreement removes the specific figures and instead, in a footnote, references the scientific study that supports them.

    While the EU and the United States appeared to have ended their impasse, India had objections to other parts of the agreement, notably the contributions developed nations would make to help developing nations clean up their emissions problems. Talks were expected to continue for several more hours.

    So, no mandatory cuts on the table, they agreed to talk some more in 2 years time. So, who will it be in 2009? President Clinton/Obama sending Al Gore for talks, or President Giuliani/Huckabee/Romney further stonewalling. Apparently, this US election is going to be pretty important as well!

    So, what does Nobel price winner Rajendra Pachauri think?

    “I wouldn’t term that a failure at all,” Pachauri said. “I think what would be a failure is not to provide a strong road map by which the world can move on, and I think that road map has to be specified with or without numbers. If we can come up with numbers, that’s certainly substantial progress, and I hope that happens.”

    I disagree. This is a numbers game. The damage caused by CO2 in the atmosphere is non-linearly proportional to the the amount in the atmosphere. The more you cut, the less damage you will cause later. At some number, the emission cuts may affect the lifestyles of certain countries. But to say that you don’t need numbers for success is just diplomatese.

    Note that Japan and Canada opposed cuts as well, but thanks to the exalted world leader position of the US, they can get away with little scorn.

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    India drastically reduces AIDs incidence

    India’s efforts at combating AIDs through the use of superior statistics and survey techniques (yes, we are geeky like that only!) pays off as the number of AIDs cases is slashed from 5.7 million to close to 3 million.

    Study: Fewer Indians with HIV seen – Yahoo News

    The number of Indians infected with HIV is far smaller than previously believed, according to new data that appears to vindicate critics who said earlier U.N. assessments of the country’s epidemic were vastly overestimated.

    Experts say the still-unreleased survey is likely to show that India’s number of HIV cases, which last year was said to be the highest in the world at 5.7 million, is actually well below that mark.

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    Now, if we can only make the other 3 million cases go away. Unfortunately, math is not going to get us there. But this is good news, I guess, for the 2.7 million people who we thought had AIDs, but actually did not. Were these poor people clued in?

    The real reason this is good news is that if money was budgeted to take care of 5.7 million cases, then it will go a little further now! Happy Friday, takes away from all the other crap going on in my world that I am too jaded and cynical to blog about.

  • Hansen Utters the M word

    Well, I for one am glad that the world’s most famous climate scientist has called for a moratorium on coal fired power plants.
    Top scientist seeks halt on coal plants – Yahoo News

    In prepared remarks to be delivered at the National Press Club Monday afternoon, NASA scientist James Hansen, who has been one of the earliest top researchers to warn the world about global warming, will call for a moratorium on building new coal-fired power plants.

    Hansen’s call dovetails with an edict by the private equity group buying TXU, a massive Texas-based utility. The equity group, led by Kohlberg Kravis Roberts & Co. and Texas Pacific Group, agreed to stop plans to build eight new coal-fired power plants, not to propose new coal-fired plants outside Texas and to support mandatory national caps on emissions linked to global warming.

    Hansen’s presentation to the press club says all coal-fired power plants that do not capture and bury carbon dioxide “must eventually be bulldozed (before mid-century).”

    The director of NASA’s Goddard Institute for Space Studies in New York, who was speaking as a private citizen, said Congress should adopt these coal cuts and if not, “citizens must accomplish this.” He said increased efficiency can make up for the cutbacks in coal.

    Hallelujah!