Vintage photos reveal what American cities looked like before the EPA regulated water and air pollution
President Trump's EPA administrator aims to roll back environmental protections in an effort to reduce the agency's spending.
NBC News25d
India has six of the world's 10 most polluted cities, report shows
HONG KONG — Six of the world’s 10 most polluted cities are in India, while California has the worst air pollution in North America, a new report shows. New Delhi was the most polluted capital ...