Showing posts with label Bisphenol A. Show all posts
Showing posts with label Bisphenol A. Show all posts

Saturday, January 16, 2010

Just one word.... Plastics



Plastic Plastic Everywhere: The 5 Gyres Project posted by Dave Chameides
....you’ve most certainly heard about the plastic mass that is floating out in the North Pacific Gyre. The gyre, one of several in the world, is a vortex of currents swirling inwards that lies between California and Japan. Like a toilet bowl that never flushes, it’s filled with plastic debris from man made items. So much so that from the first time it was studied until now, it has grown from the size of the state of Texas to twice the size of the continental United States!

How do I know this? Simple, my friends, Dr. Marcus Erikson and Anna Cummins, along with a bevy of other scientists, have traversed it, not once, but several times, in order to study what is actually happening out there. And what they found is truly disturbing. While the plastic soup is not concentrated, meaning you wouldn’t be able to see it from the air, once you get in the water, it can’t be missed. Thousands of tiny confetti-like pieces of plastic, filling otherwise pristine waters, waiting to be ingested.

I've been fascinated by the gyres ever since I heard about them a few years ago. That and the growing Dead Zones that occur in the Gulf of Mexico and around major coastal cities.

Is Plastic Making Us Fat?
Hormone-mimicking chemicals that already have a bad rap for their role as endocrine disruptors in the body (including the notorious bisphenol A (BPA)), are now thought to also screw with the body’s metabolism and, depending on the amount and timing of exposure, predispose individuals to obesity.

We’re surrounded by these chemicals: BPA and pthalates are everywhere, from water bottles to dryer sheets to the PVC pipes that deliver your shower water, and they’re taking their toll. Call them obesogens–a term coined by Bruce Blumberg, a leading researcher on the issue. A recent Newsweek story illustrates the increasing body of evidence that links these chemicals to the body’s metabolism.
Just one word... Plastics!

Wednesday, January 06, 2010

Harmful chemicals in our environment that never get reported

My bold:

The 33-year old law that was supposed to ensure that Americans know what chemicals are in use around them, and what health and safety hazards they might pose, has produced a regulatory black hole, a place where information goes in – but much never comes out.

The reason is that under the 1976 Toxic Substances Control Act (TSCA), the chemical industry has been allowed to stamp a “trade secret” claim on the identity of two-thirds of all chemicals introduced to the market in the last 27 years, according to an Environmental Working Group (EWG) analysis of data obtained from the Environmental Protection Agency (EPA). These include substances used in numerous consumer and children’s products.

EWG’s analysis also showed that:

* The public has no access to any information about approximately 17,000 of the more than 83,000 chemicals on the master inventory compiled by the EPA.
* Industry has placed “confidential business information” (CBI) claims on the identity of 13,596 new chemicals produced since 1976 – nearly two-thirds of the 20,403 chemicals added to the list in the past 33 years.
* Secrecy claims directly threaten human health. Under section 8(e) of TSCA, companies must turn over all data showing that a chemical presents “a substantial risk of injury to health or the environment.” By definition compounds with 8(e) filings are the chemicals of the greatest health concern. In the first eight months of 2009 industry concealed the identity of the chemicals in more than half the studies submitted under 8(e).
* From 1990 to 2005, the number of confidential chemicals more than quadrupled – from 261 to 1,105 -- on the sub-inventory of substances produced or imported in significant amounts (more than 25,000 pounds a year in at least one facility). In July 2009 the EPA released the identity of 530 of these chemicals, lowering the number of these moderate- and highproduction volume secret chemicals to 575.
* At least 10 of the 151 high volume confidential chemicals produced or imported in amounts greater than 300,000 pounds a year are used in products specifically intended for use by children age 14 or younger.
More:
Americans have no way to learn crucial information about more than 65 percent of new chemicals approved by the U.S. government since 1977, including the substances’ makeup and what health and safety hazards they might pose. Those “details” are being kept secret under federal policies that allow industry to claim that the chemicals’ very existence is a trade secret, the Environmental Working Group has learned.

This cloak of secrecy applies even to chemicals that industry identifies as presenting “a substantial risk of injury to health or the environment.” Under the law, companies must tell EPA anytime they find such a risk. EWG has learned, however, that in the first quarter of this year, industry used confidentiality claims to conceal the identity of more than half the chemicals it reported to Environmental Protection Agency under this requirement.

Since the EPA began keeping an inventory of known chemicals under the weak Toxic Substances Control Act (TSCA), the number of agents declared to be “confidential” has ballooned to nearly 17,000, according to the information the agency provided.
And the Washington Post:
Of the 84,000 chemicals in commercial use in the United States -- from flame retardants in furniture to household cleaners -- nearly 20 percent are secret, according to the Environmental Protection Agency, their names and physical properties guarded from consumers and virtually all public officials under a little-known federal provision.

The policy was designed 33 years ago to protect trade secrets in a highly competitive industry. But critics -- including the Obama administration -- say the secrecy has grown out of control, making it impossible for regulators to control potential dangers or for consumers to know which toxic substances they might be exposed to.

At a time of increasing public demand for more information about chemical exposure, pressure is building on lawmakers to make it more difficult for manufacturers to cloak their products in secrecy. Congress is set to rewrite chemical regulations this year for the first time in a generation.

Under the 1976 Toxic Substances Control Act, manufacturers must report to the federal government new chemicals they intend to market. But the law exempts from public disclosure any information that could harm their bottom line.

Government officials, scientists and environmental groups say that manufacturers have exploited weaknesses in the law to claim secrecy for an ever-increasing number of chemicals. In the past several years, 95 percent of the notices for new chemicals sent to the government requested some secrecy, according to the Government Accountability Office. About 700 chemicals are introduced annually.

Some companies have successfully argued that the federal government should not only keep the names of their chemicals secret but also hide from public view the identities and addresses of the manufacturers.
h/t to Lisa Frack of the Enviroblog.

(Note: I can't label specifics until I get my tags under 5000.... very frustrating and time consuming. So I can't label the TSCA, the EWG, and others... yet.)

Reminiscing on 2009's efforts to keep toxic chemicals out of our bodies

That the chemical companies want us to ignore:
Best of Enviroblog 2009: Top 10 posts
An excellent blog which I'm putting on my blogroll.

Sunday, May 24, 2009

But it adds so much flavor...

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ScienceDaily (May 22, 2009) — A new study from Harvard School of Public Health (HSPH) researchers found that participants who drank for a week from polycarbonate bottles -- the popular, hard-plastic drinking bottles and baby bottles -- showed a two-thirds increase in their urine of the chemical bisphenol A (BPA). Exposure to BPA, used in the manufacture of polycarbonate and other plastics, has been shown to interfere with reproductive development in animals and has been linked with cardiovascular disease and diabetes in humans.

The study is the first to show that drinking from polycarbonate bottles increased the level of urinary BPA, and thus suggests that drinking containers made with BPA release the chemical into the liquid that people drink in sufficient amounts to increase the level of BPA excreted in human urine.

In addition to polycarbonate bottles, which are refillable and a popular container among students, campers and others and are also used as baby bottles, BPA is also found in dentistry composites and sealants and in the lining of aluminum food and beverage cans. (In bottles, polycarbonate can be identified by the recycling number 7.) Numerous studies have shown that it acts as an endocrine-disruptor in animals, including early onset of sexual maturation, altered development and tissue organization of the mammary gland and decreased sperm production in offspring. It may be most harmful in the stages of early development.

Seems that everything we eat has come into contact with plastic somewhere in its lifespan. Back to eating homegrown twigs and leaves... and storing them in ... glass? Stainless steel? Foil? Paper bags and newspapers?

Plastic is such a part of our lives. It's going to be hard to stop using it.

Thursday, January 31, 2008

Water, water everywhere

And all of it is in plastic bottles.

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Exposing drinking bottles made from polycarbonate plastic to boiling water significantly speeds up the release of the chemical bisphenol A compared with room temperature water — and the amount of leaching is similar whether containers are well-used or brand new, researchers say.

The scientists at the University of Cincinnati found that when new and used polycarbonate drinking bottles were filled with boiling water and left for 24 hours, concentrations of bisphenol A (BPA) were released at rates up to 55 times more rapidly than with room temperature water.

Amounts of the chemical, which acts like the hormone estrogen, also leached out in higher quantities at the higher temperature, said study co-author Scott Belcher, an associate professor of pharmacology.

[snip]

Bisphenol A, widely used in such products as reusable water bottles, baby bottles, food-can linings and water pipes, has been shown to affect reproduction and brain development in animal studies.

"You could see that there are times when you would be putting hot liquids in these or boiling these or putting polycarbonate to these kinds of temperatures," Belcher said Tuesday from Cincinnati, noting that parents heat up plastic baby bottles and some people use water bottles for hot drinks.

While its effects are far from well-studied in humans, primarily because the chemical is so ubiquitous in daily life, there are concerns that BPA could contribute to some breast and prostate cancers as well as infertility in people.

[snip]

Plastic bottle maker Nalgene says on its website that BPA has been used around the globe for more than 50 years, noting studies from the U.S. Food and Drug Administration and the Environmental Protection Agency have shown the chemical doesn't pose a health risk.
Uh huh. Right. The FDA and the EPA really have proved they have the public's safety at heart recently. Here is an article referencing research done between 1996 and 1998 which tested 708 Danish men reporting for a military medical examination:
It found that 43% of them had sperm counts low enough to lead to decreased fertility - in other words, to make it difficult for them to reproduce.

They describe the sperm concentrations they found in the sample as "surprisingly low", and are at a loss to explain them.

"It remains to be seen whether these findings are generally applicable to populations of young men in the industrialised countries. Denmark seems to have relatively high rates of male reproductive abnormalities."

The World Wide Fund for Nature says it believes that a factor in the low sperm counts is exposure to endocrine-disrupting chemicals.

[snip]

These are chemicals which can interfere with the normal functioning of the body's hormonal control systems and seriously affect health.

Known disrupters include some phthalates (used in many plastic goods, including toys), Bisphenol A (used in plastic bottles, the plastic lining of food cans, and elsewhere), and TBT, an anti-fouling paint for boats.

Elizabeth Salter, the head of WWF's European toxics programme, said the Danish study "proves that reduced sperm production is real and common".

A 2004 study finds that a projected 95% of Americans have bisphenol A in their urine. Bisphenol is used to make baby and beverage bottles, to coat teeth, and line the inside of food cans.

Suggestions on how to lessen your exposure to BPA:

1. If you already own polycarbonate bottles, including the Nalgene bottles popular on college campuses, labeled #7 on the bottom, wash them by hand with mild dishwashing soap, not in the dishwasher, to avoid degrading the plastic and increasing leaching of BPA (see "Picnic Perfect Plastics").

Eight Ways to Avoid Harmful Chemicals from Cans and Plastic Bottles

2. Even plastic does not last forever. Look for cracks or cloudiness on your reusable clear plastic bottles. See The Green Guide's survey, "A Nalgene Bottle Poll."

3. Use glass baby bottles or plastic bag inserts, which are made of polyethyelene, or switch to polypropylene bottles that are labeled #5 and come in colors or are milky rather than clear.

4. Choose soups, milk and soy milk packaged in cardboard "brick" cartons, by Tetra Pak and SIG Combibloc, which are made of safer layers of aluminum and polyethylene (#2) and also recyclable.

5. Choose canned foods from makers who don't use BPA, such as Eden Foods (www.edenfoods.com), which sells certified organic canned beans and other foods.

6. Eat fresh foods in season and save the canned foods for convenience or emergencies. The exception is some canned fruit such as that found in smaller fruit-cocktail cans, which do not require a liner, according to the Can Manufacturers Institute.

7. Buy or can your own fruits and vegetables in safe glass jars. For more, see Amy's Green Kitchen "In a Summer Pickle".

8. Some wines have been found to contain up to six times the BPA of canned foods. While most wines probably don't, it's another good reason to drink in moderation.

Besides, the plastic bottles are filling up our oceans (really!) and our landfills.