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Outdoor Light at Night Linked With Increased Breast Cancer Risk in Women

  • August 18, 2017

A long-term study of women living in areas with high levels of outdoor light at night shows that they may be at higher risk for breast cancer than those who aren’t exposed to similar lighting, according to researchers at Harvard T.H. Chan School of Public Health. Calling it the most comprehensive study yet on the topic, researchers said women exposed to such lighting had a 14 percent higher chance of breast cancer, with those working night shifts most at risk. Light pollution, even...