A shallow magnitude 4.1 earthquake was reported Wednesday evening 21 miles from Ridgemark, Calif., according to the U.S. Geological Survey. The temblor occurred at 9:33 p.m.

The Missouri River's altered flow causes water shortages in Montana and Wyoming and flooding in the Dakotas

California regulators expanded the lead soil testing area near the Exide battery recycling plant in Vernon

The vehicle fuel requirement is part of California's law intended to reduce air pollutants

New study finds lack of minority representation in environmental groups
Leaders of environmental groups express concern over lack of diversity in staff following new study

Finding radioactive oil field waste is 'a game of cat-and-mouse,' North Dakota landfill director says
Bakken oil boom spurs fear of improperly dumped hazardous waste in North Dakota

U.S.-funded incinerators in Afghanistan unused, inspector general says
Batteries, plastics, tires and aerosol cans tossed into open burn pits in Afghanistan, report says

Antibiotic use has surged by 36% worldwide in a decade, much of it unwarranted, according to a new study.

A shallow magnitude 3.3 earthquake was reported Thursday afternoon about seven miles east of the Coahuila Indian Reservation in Riverside County, according to the U.S. Geological Survey.