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.
Access to a dark night sky is a universal human right, says the American Astronomical Society