[RE: “Know Your Ingredients,” April 15-21]: Gwyneth Doland is a competent food editor. Unfortunately, she is not very well informed about mercury, and her recent claims about that metal prove it, for she appears to know nothing about the well-established facts concerning mercury.
Doland claimed that coal-fired plants "spew" mercury into the air. It is generally agreed that coal-fired plants emit 50 tons of mercury into the air per year. There are approximately 447 coal-fired plants in the United States. Some quick arithmetic will show that this is about 280 pounds of mercury for all plants per day, or an average of about 10 ounces of mercury per plant per day. (The amount per day varies depending on the size of the plant and the grade of coal it is burning.) Nevertheless, at this rate mercury is not “spewing” (gushing) out of the smokestacks of coal-fired power plants.
For additional perspective, the EPA estimates that there are 158 tons of man-made mercury emissions per year in the United States, so coal-fired plants account for only about one-third of U.S. emissions. Annual world-wide mercury emissions amount to some 5,000 tons, so U.S. coal-fired plants contribute a mere 1 percent of yearly world-wide mercury emissions.
Doland wrote that there is a move afoot to "play down the established link between coal-burning power plants and dangerous levels of mercury in the nation's fish." Since there is no such "link," to that extent this assertion is false. Doland referred to a New York Times article that stated that the National Academy of Science said that the White House (the Bush administration) is trying to "play down" mercury's dangers. Somewhere along the line, this is probably false as well. The dangers of mercury are universally known, and it would be as easy to "play down" the dangers of mercury as it would be to "play down" the dangers of drunk driving.
The article also claimed that the mercury particles from power plants "fall close to the source" (close to the plant) and then are carried into rivers and streams. This is debatable. Mercury transport in the upper atmosphere, and its deposition, are poorly understood. A little more to the point, and in keeping with Doland's recommendations for fish consumption, these particles would be ingested by fresh water fish. What fish are we advised by Doland to not eat? They are shark, swordfish, king mackerel, tilefish and tuna—all salt water fish.
No one disputes the dangers of consuming methylmercury, the dangerous form of mercury that is found in fish. What is under dispute is the likelihood of danger to humans. It appears that the only known case of mercury poisoning from eating fish occurred in the '50s near Minamata Bay in Japan. According to Gary Myers, M.D., a professor of neurology and pediatrics and member of the University of Rochester (N.Y.) Research Team that studied the effects of methylmercury, there have been no reports of anyone suffering mercury poisoning from eating fish since the poisonings in Japan in the '50s and '60s. (There have been some other cases of mercury poisoning, but they were not from eating fish.)
Consumers who are worried about mercury poisoning should limit their consumption of fish, and comply with fish advisories. If Doland wants to warn us about the possible dangers of the food we eat, that is her prerogative. But Gwyneth, in the future why not obtain a broader perspective on your subject instead of succumbing to hysteria?
If coal-fired power plants each emit 10 ounces of mercury per day and New Mexico's surface water standard for mercury is a concentration of 12 parts per trillion, then 10 ounces of mercury could contaminate approximately 6.3 billion gallons of water. Even using Mr. Dapra's numbers I can't see how "spew" is too strong a word. Keep in mind that 10 ounces per day is a nationwide average and New Mexico has the highest rate of mercury emission in the west.
Mr. Dapra's own denial of the link between mercury emissions and mercury in fish is its own proof of the effort to play down undeniable facts. Even if we can't measure the exact amount of mercury in fish that comes from coal fired power plants (there are other sources of mercury), no one can deny the simple fact that putting more mercury in the air means putting more mercury in fish.
Mr. Dapra points out that mercury from power plants is ingested by fresh water fish, but the federal recommendation is for reducing consumption of several salt water fish species. Have our rivers stopped flowing into the oceans since I last checked? Furthermore, the State of New Mexico has issued fish consumption advisories for mercury for many of our lakes and reservoirs.
What really gets my goat is Mr. Dapra's claim that the likelihood of mercury's dangers to humans is under dispute. Why then, only two paragraphs above that does he write, "The dangers of mercury are universally known?" The biggest problem with mercury contamination is not that it can kill us (and it most definitely can) but that it causes irreparable harm to our unborn children. If mercury contamination flat-out killed babies instead of causing permanent neurological damage, learning disabilities, kidney and liver damage and other devastating consequences that may take years to manifest, then maybe it wouldn't be so easy for polluters to hide safely behind the skirts of an administration that's happy to help friends in need.
Concern for mercury is not "hysteria" and a broadened perspective will only make the situation look worse. A draft EPA document, suppressed by the Bush administration for nine months but leaked to the Wall Street Journal in February 2003, indicated that 8 percent of women in the United States between the ages of 16 and 49 have mercury levels in their blood that could lead to reduced IQ and motor skills in their children. Mercury contamination is a real danger and it is within our power to curb it. We have an obligation to do just that.
First, I would like to compliment everyone associated with organizing the Spring Crawl; good job! Second, one small suggestion: How about cellphone charging stations? I visited Burque from Roswell with a large group of people and we used our phones extensively to coordinate. As the night wore on, our phones wore out.
Despite the laughable miscommunications snafus, nobody was lost for long, and a memorable time was had by all (hangovers not withstanding). Thanks again, and we'll see you at Fall Crawl!
Letters should be sent with the writer's name, address and daytime phone number via e-mail to email@example.com. They can also be faxed to (505) 256-9651. Letters may be edited for length and clarity, and may be published in any medium; we regret that owing to the volume of correspondence we cannot reply to every letter.
Peter Shankman: A Thrilling Conversation at Sheraton Airport Hotel
Rapid Strike Flight Simulator at National Museum of Nuclear Science and History
Bosque Wild Guided Nature Walk at Open Space Visitor CenterMore Recommented Events ››