People who eat fish from glacial meltwater may be at risk from persistent organic pollutants produced in the 20th century.
Sediment core from a Copenhagen lake tells the story of the Industrial Revolution.
Nicotine in the air and clothing permeates skin and enters the bloodstream at levels equivalent to inhalation of secondhand smoke.
Citizen scientists confirm that plastic pollution is blemishing previously pristine beaches in the Arctic Ocean.
Mass migration to Chinese cities has likely decreased the total number of premature deaths caused by air pollution.
Hundreds of U.S. streams may have significant levels of endocrine-disrupting chemicals from treated wastewater.
Aerosol pollution may have suppressed global warming and increased Arctic sea ice from 1950-1975.
Study estimates that without new "congestion pricing" policy, kids would have suffered 45 percent more asthma attacks.