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Flame Retardants and Hyperthyroidism in Cats

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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    In case you did not know already, the IPCC is very close to releasing its report on climate change impacts.

    BBC NEWS | Science/Nature | Climate change ‘to hit poor hard’

    Dr Parry outlined the four areas of the world now thought to be the most vulnerable to climate change. “The arctic, where temperatures are rising fast and ice is melting; sub-Saharan Africa, where dry areas are forecast to get dryer; small islands, because of their inherent lack of capacity to adapt and Asian mega-deltas, where billions of people will be at increased risk of flooding,” he explained. As a result, the most severe impacts will be felt by the world’s poorest countries, the report says. “The poorest of the poor in the world… are going to be the worst hit and are the most vulnerable in terms of impact of climate change,” said IPCC chairman Rajendra Pachauri. Mr Pachauri said those people were also the least equipped to deal with the effects of such changes. Scientists and government officials from more than 100 countries met through the night, trying to agree on the wording of a summary for policy makers. Several delegations, including the US, Saudi Arabia, China and India, had asked for the final version to reflect less certainty than the draft.

    The U.S objected to the contention that climate change would cause severe economic damage in the United States, China wanted to reduce the certainty applied to these changes, and I have no idea what India would object to, since it stands to lose a great deal. But as usual, the  people who have the most to lose are not the ones doing the negotiating, so I guess that is to be expected.

  • Apparently, the Earth is warming up…

    story.global.warming.2.jpgAnd Dog bites man, yet again, it’s amazing how they keep doing that. Think of all the money being wasted on re-proving the obvious, this is money not spent in mitigating the effects, money not spent on research, money not spent on encouraging people to use more efficient lighting… It’s a shame.

    CNN.com – Study: Earth ‘likely’ hottest in 2,000 years – Jun 22, 2006

    Climate scientists Michael Mann, Raymond Bradley and Malcolm Hughes had concluded the Northern Hemisphere was the warmest it has been in 2,000 years. Their research was known as the “hockey-stick” graphic because it compared the sharp curve of the hockey blade to the recent uptick in temperatures and the stick’s long shaft to centuries of previous climate stability.

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    Endocrine Disrupting Chemicals – A new Resource

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    Critical Windows of Development

    This promises to be an easy to use database showing development timelines of infants, and the documented effects of endocrine disrupting chemicals at these timelines. The prime focus is bisphenol A and phthalates at this point in time. The Environmental Health News has more about the program here. It is not out for public consumption yet, so stay tuned…

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    North Carolina, you’re next, smoking bans finally make inroads in tobacco country.

    Where Tobacco Ruled, Smoking Ban Gains Ground – New York Times

    Tennessee will probably become the first major tobacco-growing state to pass a comprehensive smoke-free-workplace law. Gov. Phil Bredesen, a Democrat, proposed the ban in February. He also wants to triple taxes on cigarette sales and to use some of the money for smoking prevention.

  • Nuclear Energy not Carbon Free?

    Who would have thunk it, turns out that uranium mining and nuclear waste storage result in significant carbon emissions…
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    The report, called “Secure Energy? Civil Nuclear Power, Security and Global Warming,” examines a number of risks from nuclear power development, including concerns over the disposal of radioactive waste and the threats from terrorist groups. But its most novel component may be the quantitative examination of carbon emissions on a comprehensive basis. “Carbon emissions are a global problem and it’s time to look at the carbon released by nuclear power globally,” says Jan Willem Storm van Leeuwen, author of the report’s chapter on carbon emissions. “The assumption has long been that the [greenhouse] effect is zero, but the evidence shows otherwise.”

    carbonfacts_sm.jpg“Novel component”?, well, I would not go that far, it appears that the authors performed a carbon footprint analysis and concluded that the carbon footprint of nuclear fission energy production was somewhere between renewables and fossil fuel power generation, which is not entirely surprising. Coupled with all the other issues facing nuclear energy, and the obvious environmental justice issues that impact the siting of any new plant or waste repository, nuclear energy should not be a very serious option at all. Unfortunately, it’s a great boondongle for the developers of the plants because the subsidies and power pricing mechanisms ensure profits for the developer at the expense of the general public, and waste disposal issues can forever be postponed, eventually leaving governments (and tax payers) to pick up the tab.

    By the way, go read Jamais Cascio’s interesting post about the carbon footprint of a cheeseburger. The “nutrition like label” shown here is something I wish to see in almost every product used! It would make the regulation of carbon a lot less complicated. It appears that England will take the lead on this concept, see Carbon Labelling (yes, 2 L’s, the “correct” spelling!).

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