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B. The EMF-Cancer Connection Considered Weak

Narrator: This is Science Today. After years of research, the National Institute of Environmental Health Sciences has concluded that the possible link between cancer and electromagnetic fields, or EMFs, is "weak". Richard Luben, a professor of biomedical sciences at the University of California, Riverside was on a panel helping review the data.

Luben: There's a lot of confusion about EMFs because the scientific data are weak. There were some studies that suggested that people who lived close to high energy power lines had higher levels of leukemia and possibly a few other diseases. And people got very excited and there's been a big effort to try and understand what's going on.

Narrator: The only link researchers found was a very slight increase in the incidence of childhood leukemia. Still, that was enough for the panel to list EMFs as a "possible" carcinogen - a category that includes inhaling fumes while pumping gas.

Luben: You're breathing carcinogens when you do that and there's a slight risk associated with that. Most of us are willing to accept that risk, so people have to make up their own minds, what to do about EMF.

Narrator: For Science Today, I'm Larissa Branin.