Sunday, May 23, 2010
Thursday, May 20, 2010
Article from local source
Also, here's an article in support of GM foods from the Watertown Daily Times. Describes how people are naturally afraid of new technology, and that genetic modification has been used for quite a while without damage.
The Biolistic Method (or gene-gun method)
In the U.S. alone, farmers spray, spread, and otherwise administer more than 970 million tons of insect- and plant-killers every year. These pose threats to the environment. Pesticide residues linger on crops and in soil, find their way into the guts of wildlife that eat contaminated foliage, and leach into groundwater and wash into streams.
If a crop boasts its own ability to resist invertebrate predators, then farmers can use far fewer chemicals. In 1999, according to the Environmental Protection Agency, cotton farmers in states raising significant amounts of cotton genetically modified to withstand pests sprayed 21 percent less insecticide -- that is, they sprayed one to two times rather than eight to ten.
-Sprayed 21% less insecticide
Similarly, endorsers profess that farmers raising crops bearing herbicide resistance -- such as those using the Monsanto-crafted soybean that is resistant to the company's broad-spectrum weed killer Roundup -- will use fewer chemicals in a season than they would while growing conventional soybeans.
Industry spokespersons acknowledge the possibility that cross-pollination could occur between some types of GM crops and weeds. But they claim there are ways around that, such as creating GM crops that are male-sterile -- that is, produce no pollen -- or modifying a GM plant so its pollen doesn't have the introduced gene. As for the danger of pests growing tolerant of plant-borne insecticide, farmers can create buffer zones of conventional crops around GM fields to give harmful insects something to feed on, reducing the selection pressure to adapt to the anti-pest plant. Buffer zones would also deter cross-pollination and provide a refuge for harmless and beneficial insects.
-Reduce risk of creating "superweeds" via cross-pollination by making GM plants male sterile or modifying their pollen
-Create buffer zones to reduce selection pressure and provide a place for beneficial insects
What if you knew that scientists submit that genetically modifying plants is completely natural?
Genetic modification couldn't be more natural, geneticists say. Plants (and animals) genetically modify themselves all the time. That's the basis of evolution. We've been genetically modifying plants (and animals) for millennia. That's the basis of agriculture.
-Genetic modification is natural because it is the basis of evolution
Our manipulation of a single mustard species has generated such diverse vegetables as broccoli, Brussels sprouts, and cabbage. Altogether, the wild ancestors of grapes, potatoes, and all other fruits and vegetables you find today on grocery-store shelves are but pale shadows of their modern, highly modified descendants. All have gone through countless generations of careful hybridization and genetic breeding to improve yields, taste, size, texture, and other attributes.
-Plants (fruits and vegetables) self-evolve, which is considered genetic modification
Modern GM methods are simply more precise, scientists stress. Whereas traditional plant breeding involves thousands of shared genes every time two plants are crossed, GM technology allows, if desired, for the exchange of a single gene between plants. GM procedures are also much faster. In months or years, molecular scientists can accomplish the same degree of alteration that might have taken Nature millions of years to achieve.
-Genetic engineering is like natural modification, except that it is much more precise and quick
What if you knew that companies that fashion GM seeds maintain that GM crops hold the greatest hope for adequately feeding our rapidly expanding world population?
Biotech spokespersons have argued that, while the industry is indeed concerned about the bottom line, it is primarily driven by research and innovation. Their argument is straightforward: Innovation is the only way to meet the world's burgeoning needs for food and medicines in a rapidly shrinking and increasingly scarred natural environment. Innovation requires costly and time-consuming research and testing, which will only happen if it's paid for. The best way to ensure it's paid for is through intellectual property protection. Patents should operate worldwide, they maintain, because markets are increasingly global in nature.
-World population is rapidly increasing, environment is being depleted, and the world must increase crop production
-This can only be done using genetically modified crops
The result of this innovation will be GM crops that will offer our best chance to adequately address the challenge of feeding the estimated six billion people who, in as few as 50 years by some estimates, will join the six billion of us already here. GM crop farming holds out greater promise than conventional farming of boosting production on the same amount of ground, adherents say, and of raising crops where none could grow before, such as on salt-laden land. In increasing yields and making marginal lands productive, GM promoters insist, lie our only means of staving off widespread famine in developing countries in the coming decades.
-Increasing yield for the same amount of groundBiotech firms hold that every GM food crop is thoroughly tested for possible health effects. They conduct these in-depth analyses, they say, because they are legally required to ensure foods they sell meet federal safety standard
Wednesday, May 19, 2010
Concerns and Risks of GM Foods
- Lack of studies in regards to safety of GM foods
- Long-term effects near impossible to study
- GM crops persist in the environment, posing possible health risks in the future
Hasn't research shown GM foods to be safe?
No. While only a pitifully small number of animal feeding safety studies have been conducted, several showed evidence of problems.Rats fed an experimental GM potato developed potentially pre-cancerous cell growth, damaged immune systems, smaller brains, livers, and testicles, and partial atrophy of the liver. ...
Since no one is monitoring the human health impacts of GM foods, it might take years to discover most reactions.
In comparion to other food dangers (pesticides, radiation, preservatives, etc.):
Since so little research has been done on the safety of GM foods, it is not possible to rank its risks. Unlike the others, GM crops persist in the environment, and may continue to pose risks to health for centuries....
The biotech industry says that millions have been eating GM foods without ill effect. This is misleading. No one monitors human health impacts of GM foods. If the foods were creating health problems in the US population, it might take years or decades before we identified the cause.
Technology, Institute for Responsible. "Genetically Modified Foods Are Unsafe to Eat." Current Controversies: Genetic Engineering. Ed. James D. Torr. Detroit: Greenhaven Press, 2006. Opposing Viewpoints Resource Center. Gale. West Seneca West Senior High School Lib. 19 May. 2010
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Main points:
- Genetic modification may result in undesired genetic alteration apart from target genes
- Few safety studies--one study describes many complications caused by genetic modification
- Human trial caused genetically-engineered genes to transfer to digestive tract bacteria
While scientists originally assumed that the inserted genes would only add a particular desired trait to the crop, new evidence suggests that the host's normal natural genes can get switched off, turned on permanently, damaged, or altered in the process.
...
Unfortunately, there have been very few safety studies. Of the 10 published animal feeding studies, the most in-depth one showed evidence of damaged immune systems, digestive problems, excessive cell growth, and stunted organ development in rats fed an experimental GMGM food on the market. potato. The scientist identified the process of genetic modification as the probable cause—the same process used in creating most GM foods on the market.
...
The only human feeding trial ever conducted confirmed that genetically engineered genes from soy burgers and a soy milkshake transferred to the bacteria inside the digestive tract after only one meal, making the bacteria resistant to herbicide.
Smith, Jeffrey. "Genetically Modified Foods Are Dangerous and Unneeded." Opposing Viewpoints: Global Resources. Ed. David M. Haugen. Detroit: Greenhaven Press, 2008. Opposing Viewpoints Resource Center. Gale. West Seneca West Senior High School Lib. 19 May. 2010
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Environmental Hazards
Main points:
- Gene transfer to other species
- Development of resistance to pesticides, possibly rendering pesticides useless
Besides threatening monarchs and other wildlife, the crops could spread their engineered genes to nearby wild plants, critics warn. The same genes that allow engineered crops to fend off insect pests might transform wild plants into "super weeds" that could overrun the landscape.
...
Others warn that insect pests may quickly build resistance to crops engineered to produce natural pesticides. This may not only render the pesticides useless—it could touch off an agricultural arms race between insects and humans, in which scientists would constantly have to design new pesticides in order to stay ahead of insects' ability to adapt to them.
"The Promise and Perils of Plant Biotechnology." Today’s Science On File: n. pag. Today’s Science. Facts On File News Services, 31 July 1999. Web. 19 May 2010.