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Flame Retardants and Hyperthyroidism in Cats

Byoliveridley

Caveat Emptor: They found a correlation, not a causative mechanism. But Polybrominated Diphenyl Ethers (PBDEs, yum!) have structures that can mimic endocrine hormones. Because hormones signal at very low doses and continuously, our whole toxicological risk testing structure of looking for acute effects at high doses and trying to extrapolate those effects to low doses is flawed for endocrine disrupting compounds. We are finally beginning to see some new research, especially with other toxics such as Bisphenol A, which test for chronic conditions and subtle gene and hormonal signalling effects at low doses. After all, small changes in hormone regulation especially at childbirth and a young age can have very serious effects later on in life.

Inside Bay Area – NEW: Flame retardants linked to thyroid disease in cats

A mysterious epidemic of thyroid disease in cats may be linked to flame retardants common in carpets, foam furniture and mattresses, according to U.S. Environmental Protection Agency researchers, who suggest that scientists have underestimated the damaging health risk the chemicals pose to humans.

The research, published Wednesday in the journal Environmental Science and Technology, does not prove these compounds, known as PBDEs, caused the rash of hyperthyroidism in the nation’s household cats over the past 30 years.

Rather, it lays out a hypothesis, showing that cats are heavily contaminated by these compounds, which leach from household products and are found everywhere, particularly household dust. Cats, meticulous cleaners, ingest PBDE-contaminated dust daily.

The case of fire retardants is especially difficult because they save many lives, so manufacturers can always point to that fact and resist change. The logical fallacy, however is as follows:

  1. Fire retardants save lives (therefore good)
  2. PBDEs are fire retardants
  3. Therefore, PBDEs are good!!

The search for a safer fire retardant needs to continue, and will not happen unless the old ones are under pressure of being phased out.

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    Black Lung – Miners pay so you can get more coal

    Byoliveridley

    The Pump Handle alerts us to a special report on coal miners and their lungs, not for the faint of heart, but something to keep in mind when you hear the phrases “Cheap Energy” and “coal” in one sentence, it’s not so cheap for these people.

    Black Lung: Dust Hasn’t Settled on Deadly Disease « The Pump Handle

    Louisville-Courier Journal reporters Laura Unger and Ralph Dunlop offer us the voices and faces of miners who are suffering from coal workers’ pneumoconiosis. Their special report, Black Lung: Dust Hasn’t Settled on Deadly Disease, includes an on-line version which features five compelling videos featuring 40- and 50-year old coal miners who are now suffering with the disabling lung disease. Mr. Danny Hall, 56, for example, who is still severely impaired despite receiving a lung transplant says “if I had to do over, I wouldn’t ever go into coal mining.”

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    Conventional biofuels are evil, part 4233241

    Byoliveridley

    English to American Translation:

    Rapeseed = Canola.
    Maize = Corn.

    Turns out that all the nitrate fertilizer you use to grow all the corn and canola you need emits a lot of Nitrous Oxide. No laughing matter, this, N2O is an incredibly powerful greenhouse gas.

    Rapeseed biofuel ‘produces more greenhouse gas than oil or petrol’ – Times Online: “Measurements of emissions from the burning of biofuels derived from rapeseed and maize have been found to produce more greenhouse gas emissions than they save.

    Other biofuels, especially those likely to see greater use over the next decade, performed better than fossil fuels but the study raises serious questions about some of the most commonly produced varieties.

    Rapeseed and maize biodiesels were calculated to produce up to 70 per cent and 50 per cent more greenhouse gases respectively than fossil fuels. The concerns were raised over the levels of emissions of nitrous oxide, which is 296 times more powerful as a greenhouse gas than carbon dioxide”

  • Models underestimate global warming impacts

    Byoliveridley

    No, not Tyra Banks and Riyo Mori, climate models that is.

    ES&T Online News: Models underestimate global warming impacts

    Modelers don’t purposely err on the conservative side, says Marika Holland of the National Center for Atmospheric Research, but some processes “are just not well understood, and because of that have not been incorporated into climate models.” Holland has published model results on the fate of sea ice and coauthored the recent paper showing that ice is melting faster than models predicted. There are many reasons for the underestimates, she says. For example, models don’t fully capture heat transport between ocean and atmosphere, or faster warming as reflective ice gives way to darker, heat-absorbing waters.
    But Rahmstorf says that modelers might unwittingly make models more conservative by applying “one-sided filters”, weeding out models that clearly overestimate the changes seen so far, but hanging onto ones “where everything is too well behaved and stable.”

    Scientists are human too. The political and social climate in the US have been harsh to people who overestimate the effects of climate change. So, modeling scenarios that deviate significantly from accepted limits or runaway uncontrollably are discarded. Models are sets of assumptions based on underlying theory. If the theory of a particular sub-process is not clearly understood, then the assumptions become subjective. In a social climate that is waiting to pounce on an overestimate as example of negating the entire global warming phenomenon, assumptions made are conservative. This is not necessarily a bad thing, but it comes at a price! As more observations come in, it does become clear that sometimes, things are happening faster and at greater magnitudes than our model predicted.

  • Coal-to-Liquid: Useless

    Byoliveridley

    Liquid transportation fuels derived from coal and natural gas could help the United States reduce its dependence on petroleum. The fuels could be produced domestically or imported from fossil fuel-rich countries. The goal of this paper is to determine the life-cycle GHG emissions of coal- and natural gas-based Fischer−Tropsch (FT) liquids, as well as to compare production costs. The results show that the use of coal- or natural gas-based FT liquids will likely lead to significant increases in greenhouse gas (GHG) emissions compared to petroleum-based fuels. In a best-case scenario, coal- or natural gas-based FT-liquids have emissions only comparable to petroleum-based fuels. In addition, the economic advantages of gas-to-liquid (GTL) fuels are not obvious: there is a narrow range of petroleum and natural gas prices at which GTL fuels would be competitive with petroleum-based fuels. CTL fuels are generally cheaper than petroleum-based fuels. However, recent reports suggest there is uncertainty about the availability of economically viable coal resources in the United States. If the U.S. has a goal of increasing its energy security, and at the same time significantly reducing its GHG emissions, neither CTL nor GTL consumption seem a reasonable path to follow.

    Comparative Analysis of the Production Costs and Life-Cycle GHG Emissions of FT Liquid Fuels from Coal and Natural Gas.

    To summarize, no cost benefits, increased GHG emissions, a lot of uncertainty, let’s not follow this madness of trying to make coal into gasoline.

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    ES&T Online News: E-waste recycling spews dioxins into the air

    Byoliveridley

    ES&T Online News: E-waste recycling spews dioxins into the air

    When computers, televisions, music systems, and other electronic products reach the ends of their lives, they often end up in China or other developing countries as e-waste. Such waste is a serious environmental threat in these parts of the world because of the poorly regulated conditions under which the waste is dismantled. A new study published in ES&T (DOI 10.1021/es0702925) shows that Guiyu, a major e-waste recycling center in China, has the highest documented levels of atmospheric polychlorodibenzo-p-dioxins (PCDDs) and polychlorodibenzofurans (PCDFs) in the world.

    In e-waste recycling centers in China, discarded products are dipped into open pits of acid and heated over grills fueled with coal blocks to extract precious metals, such as gold. These processes often release toxic metals, such as lead, and organic compounds, such as dioxins. The emissions are not regulated, and occupational exposure is high because of the poor working conditions for e-waste recycling laborers.

    In March 2007, researchers at Hong Kong Baptist University showed that soil at e-waste recycling sites in China has high levels of dioxins and polybrominated diphenyl ether (PBDE) flame retardants. (Read the paper at ES&T‘s ASAP website.) More recently, another study published in ES&T showed that the workers at these sites have blood levels of the heavy PBDE, BDE–209, 50–200 times higher than those previously reported. Whereas dioxins are potentially carcinogenic for humans, PBDEs affect thyroid metabolism and brain development.

    In the current study, Ping’an Peng of the Guangzhou Institute of Geochemistry (China) and his colleagues sampled the air from Guiyu for a week in both the summer and the winter and analyzed the samples for 2,3,7,8-PCDD/Fs. The levels varied between 64.9 and 2765 picogram per cubic meter (pg/m3). The toxic equivalents (TEQ)—a value used to account for the different levels of toxicity of the individual dioxins—was 0.909–48.9 pg TEQ/m3. Given that Guiyu has no municipal or medical solid-waste incinerators, which are known to be major sources of dioxins, the authors attributed the elevated dioxin levels to e-waste recycling.

    The team also found that the dioxin concentrations in the air around Guiyu were 12–18 times higher than those in Chendian, a town 9 kilometers (km) from Guiyu, and 37–133 times higher than those in Guangzhou, which is 450 km from the e-waste site. The results suggest that dioxin pollution from e-waste recycling is spreading to nearby areas.

    When they calculated the exposure of adults to dioxins through inhalation, the researchers found that it (68.9 and 126 pg TEQ per kilogram per day in the summer and winter, respectively) was a whopping 15–56 times higher than the World Health Organization recommended maximum of 1–4 pg TEQ/kg/day.

  • California takes coals out of the fire

    Byoliveridley

    Seriously, for every bit of bad news you read in the New York Times about coal, you read a good news story about the LA Times about coal!

    State acts to limit use of coal power – Los Angeles Times

    The California Energy Commission on Wednesday imposed new rules that effectively forbid the Los Angeles Department of Water and Power and all other municipal utilities in the state from signing new contracts with coal-fired power plants. The move, together with identical regulations imposed on private utilities in January, is a significant step toward reducing the contribution of California, the world’s sixth largest economy, to global warming.

    This is important because California is a huge market and is imposing its market power wisely. It will buy coal power if sequestration actually works.

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