Environmental Disorders

Brian Seligman holds a sign to protest a gas leak in the Porter Ranch area of Los Angeles before a meeting of the California Air Quality Management District in Granada Hills, California January 9, 2016. Southern California Gas Company has been tackling a Los Angeles-area natural gas leak that has been sickening nearby residents for more than two months. REUTERS/Danny Moloshok TPX IMAGES OF THE DAY

Urban Air Pollution Negates Health Benefits Of A Long Walk On City Streets

Air pollution on city streets can wipe outthe beneficial health effects of exercise for people aged 60 and older, according to a new study led by scientists at Duke University and Imperial College Lon...