It seems like every other week a study comes out telling us that cell phone usage can cause brain cancer, or conversely, that they don't harm us at all. Today the British Medical Journal published a new study by scientists in Copenhagen, which falls in line with the later theory: no evidence of harm. People are taking note of this study because it took into account the entire over-30 population of Denmark, which is around 350,000.

Reuters reports:

"At the end of May, the World Health Organization's International Agency for Research on Cancer decided cell phone use should be classified as "possibly carcinogenic to humans," putting then in the same category as lead, chloroform and coffee.

But just over a month later the International Commission on Non-Ionizing Radiation Protection's committee on epidemiology said the scientific evidence increasingly pointed away from a link between mobile phone use and brain tumors."

Now we have to see if the reaction to this is as frantic as the reports that cell phones might be harmful.

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Follow John Moe at @johnmoe