Friday, May 24, 2013
By MALCOLM RITTER and SETH BORENSTEIN The Associated Press
We've always played with our food -- even before we knew about genes or how to change them.
A cow wearing an ear tag eats on the Fazenda Gramada government farm in Brazil. The 1,850-acre farm is an experiment that integrates the raising of crops, cattle and timber in a bid to defend the Amazon from defores-tation. In the past 15 years, genetically altered plants have been grown on more than 2 billion acres worldwide.
The Associated Press
For thousands of years, humans have practiced selective breeding -- pairing the beefiest bull with the healthiest heifers to start a new herd. That concept was refined to develop plant hybridization and artificial insemination. Today, we've got tastier corn on sturdier stalks, bigger turkeys and meatier cattle.
Now comes an Atlantic salmon that is genetically engineered to grow twice as fast as a regular salmon. If U.S. regulators approve it, the fish would be the first such scientifically altered animal to reach the dinner plate.
Scientists have already determined that it's safe to eat. They are weighing other factors, including environmental risks, after two days of intense hearings.
Whatever the decision on salmon, it's only the start of things to come. In labs and on experimental farms are:
• Vaccines and other pharmaceuticals grown in bananas and other plants.
• Trademarked "Enviropigs" whose manure doesn't pollute as much.
• Cows that don't produce methane in their flatulence.
To the biotech world, precise tinkering with the genes in plants and animals is a proven way to reduce disease, protect against insects and increase the food supply to curb world hunger.
To skeptics, genetic changes put the natural world and the food supply at risk. Modified organisms can escape into the wild or mingle with native species, potentially changing them, with unknown effects.
In the past 15 years, genetically engineered plants have been grown on more than 2 billion acres in more than 20 countries. Consumers eat genetically engineered plant products in large quantities in the United States, often in unlabeled products such as oils and processed foods.
The same crops are viewed more suspiciously in Europe and India. China, meanwhile, is working to develop genetically modified rice that would be less prone to insect damage.
Some experts say the natural food of our forebears is, for the most part, long gone. That's mostly due to selective breeding and other now-commonplace practices.
That has led to turkeys that "can't have sex anymore because we've been breeding them for big chests," says Martina Newell McGloughlin, director of the University of California's Biotechnology Research and Education Program.
"All of the animals, plants and microbes we use in our food system, our agricultural system, are genetically modified in one way or another," says Bruce Chassy at the University of Illinois at Urbana-Champaign. "That, or they're wild."
The modifications are mostly from selective breeding and hybridization, the traditional ways of changing plants and animals. But these methods used for thousands of years are compared by genetic engineers to using a sledgehammer. They say their techniques are like using a scalpel.
"Genetic engineering is more precise and predictable, yet it is regulated up the wazoo," McGloughlin says. "Yet there is no regulation at all on the traditional breeding system."
More than four-fifths of the soybean, corn and cotton acreage in the United States last year used genetically engineered plants, according to a 2010 National Academies of Sciences study.
David Ervin of Portland State University in Oregon, chairman of the committee that wrote the report, said it found no large-scale environmental risks associated with the current genetically engineered corn, cotton and soybeans in the United States. As for future crops, "you just have to be very cautious," depending on the nature of the plants, he says.
The report, which didn't consider health impacts of eating genetically engineered crops, did recommend large-scale studies of ecological effects of such crops, Ervin said.
Marion Nestle, a New York University professor and expert on food studies and public health, says that in processed food, "if it's got beet sugar, soybean or sugar, it's got an 85 to 95 percent chance of being genetically modified."
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