Wednesday, January 31, 2007

THE PROBLEM WITH GENETIC ENGINEERING

THE PROBLEM WITH GENETIC ENGINEERING

Ten reasons why all of us should be troubled about the rapid proliferation of genetically engineered foods:

1. SUPERBUGS
Of the 50 or so genetically engineered plants currently cleared by the government for use, most fall into two basic categories: plants engineered to include their own pesticide, a toxin produced by the BT (Bacillus thuringiensis) bacterium, and plants engineered to survive weed killers, including the so-called "Roundup-Ready" soybeans and cotton.

BT is a natural and highly effective pesticide that has long been used by organic growers to control caterpillars and other pests. What organic farmers and gardeners use sparingly, biotechnology has introduced into each cell of every genetically engineered plant, from the roots to the pollen to the chaff plowed under after harvest. Because of BT's ubiquitous presence in millions of acres of crops, even the industry's own scientists concede that it is just a matter of time — as little as three to five years — before BT resistant insect strains evolve. Directives that farmers interplant these BT carrying crops with non-modified varieties are expected to merely delay the inevitable. When the inevitable happens, organic growers will lose a powerful pest control, and conventional growers will return to chemical pesticides — unless, of course, biotechnology can come up with yet a new generation of pest-immune crops.

Although there is no evidence that BT carrying crops hurt humans, there is something unsettling about eating food that is itself a pesticide registered with the EPA. Unlike conventional pesticides, the built-in BT bug killer cannot be washed off; it is in every bite.

2. SUPERWEEDS
Scientists also warn that some herbicide-tolerant crops are cross-pollinating with wild cousins and could create herbicide-resistant weeds. Another threat, according to Jane F. Rissler, PhD, Deputy Director/Senior Staff Scientist for the Food and Environment Program at the Union of Concerned Scientists (www.ucsusa.org), is that some genetically engineered crops themselves, bred to resist insects and other natural controls, could become invasive, spreading beyond their fields and choking out natural habitats.

3. POLLEN DRIFT
Organic farmers could lose their certification and face huge financial losses if their fields are contaminated by wind-born pollen from neighboring genetically modified crops. Even nonorganic farmers are at risk for problems. In Canada, Monsanto accused canola grower Percy Schmeiser of patent infringement after the company found genetically engineered Roundup Ready canola plants in Schmeiser's fields. Schmeiser claims he never planted any Monsanto seeds. After mediation efforts failed, Schmeiser filed a ten million dollar lawsuit against Monsanto, claiming libel, trespass, and contamination of his fields. The litigation continued until the case was decided in Canada's Supreme Court in May, 2004. Monsanto's patents were upheld but Schmeiser was not required to pay Monsanto. However, the issue of contamination continues for Schmeiser, according to his web site www.percyschmeiser.com.

4. HARM TO WILDLIFE
Cornell University researchers made headlines when they announced laboratory research showing that monarch butterfly larvae died after eating milkweed dusted with genetically engineered corn pollen containing the BT pesticide. Milkweed, the monarch's primary food source, commonly grows alongside corn. Researchers in Europe have made similar discoveries involving ladybugs and green lacewings, both beneficial insects. Yet another study, reported in 1997 in the British publication New Scientist, indicates that honeybees may be harmed by feeding on proteins found in genetically engineered canola flowers.

5. HARM TO SOIL
Microbiologists at New York University have found that the BT toxin in residues of genetically altered corn and rice crops persists in soils for up to eight months and depresses microbial activity. In another study, scientists in Oregon tested an experimental genetically engineered soil microbe in the laboratory and found it killed wheat plants when it was added to the soil in which they were grown.

6. HUMAN HEALTH
Even as the biotech industry and government regulators have assured us that there is no reason to worry, a growing body of evidence indicates that genetic engineering can cause unintended changes to our food, making it less nutritious or even harmful. For example, a study in a 1998-99 issue of the Journal of Medicinal Food indicates that compared with non-modified soy varieties, genetically altered, herbicide-tolerant varieties may contain lower levels of potentially beneficial plant estrogens. Another study, reported in a 1996 article in the International Journal of Health Services, warns that milk produced from cows injected with Monsanto's controversial genetically engineered bovine growth hormone (BGH) contains higher levels of a growth factor that may be linked to increased risk of both breast and gastrointestinal cancers in humans. Americans have been drinking unlabeled BGH produce milk for years, but it has always been banned in Canada and Europe.

7. HIDDEN ALLERGENS
The foundation of genetic engineering is DNA, which directs the production of proteins. Proteins are also common sources of human allergies. When DNA from one organism is spliced into another, can it turn a non-allergenic food into one that will cause an allergic reaction in some people? Yes, reported researchers in The New England Journal of Medicine in 1996. The case involved an attempt by the Iowa based biotech seed company Pioneer Hi-Bred International to change the protein content of soybeans by adding a gene from the Brazil nut. When researchers tested the modified soybean on people with sensitivity to Brazil nuts (but no sensitivity to soybeans), they found it triggered an allergic reaction. Based on those findings, the company shelved development of the soybean. The author of an editorial in the same issue wrote that the next case could be less ideal, and the public less fortunate.

8. RELIGIOUS AND MORAL CONSIDERATIONS
People who choose not to eat animals for religious or moral reasons face an almost impossible task with many genetically engineered foods. When cold-hardiness genes from flounder are spliced into tomatoes, or genes from chickens are added to potatoes for increased disease resistance, are those vegetables still, purely speaking, vegetables? Without mandatory labeling, how can people who object to eating any trace of meat know what they are getting?

9. ANTIBIOTIC RESISTANCE
Genetic engineers use antibiotic marker genes to help them transfer genetic coding from one life form to another. Some scientists worry that this process could compound the already serious problem of antibiotic resistance in humans. Government scientists in Britain warn that the antibiotic resistance introduced into humans from genetically modified foods could render established medical treatments for such infections as meningitis and gonorrhea ineffective.

10. INDENTURED FARMERS
Because genetic engineering research is so expensive, for-profit corporations whose primary goal is return on investment, not public good, largely control it. These corporations are rapidly buying up seed companies and gaining control of entire food production systems and educational research facilities. Farmers who use this patented technology are prohibited from the time-honored tradition of saving seed to use the following season. They are forced into a costly cycle of corporate dependency.

The results of 50 years of chemical-based "high-tech" agriculture have made clear that we must rethink the way we grow food. The answer lies in a return to sustainable, organic growing practices. Our children and grandchildren have just one future. Are we willing to risk it?

1 comments:

Unknown said...

Consider this:

Many engineered plants are modified to include a Pesticide in the gene sequence, natural or artificial pesticide is not my point; my point is that a poison is in the gene sequence of the plant.

The poison in the gene sequence of the plant acts as a poison in the gut of the insects it is designed to deter or kill. That is, it has the same net effect as a pesticide in the gut of the insect that eats the plant.

Can one posit for debate that the gene sequence acts the same way in the gut of a human being? That is, it acts as a poison or a pesticide, probably with detrimental effects such as killing off the beneficial bacteria (thus the rise in popularity of activia and yogurt products), and may accumulate and cause gut cancers of one kind or another?

Can one posit for debate that some humans will be more sensitive to such poisons and pesticides than others, giving rise to an entirely new and unique set of potential allergies, horrific reactions, and organ decay?

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