"Canadian National Railway pleaded guilty on Monday to polluting Canada's wilderness in two train derailments, one of them resulting in the largest inland oil spill in Canada's history."

"Railroad companies are pressing federal regulators to cut back on trains carrying hazardous materials through urban areas, saying they fear a catastrophic release of toxic chemicals in a large city."

Despite having been banned in most uses for years, carbon tetrachloride, a probable carcinogen, persists in the environment. USA TODAY found it outside 70 of 95 schools in 30 states.

EPA has found suspect materials in a small sample of Chinese-made drywall that some believe may be causing corrosion in homes and possibly sickening people.

"Critically ill newborns may help researchers figure out whether children are at risk from plastic additives called phthalates."

"Fighting off shareholders’ environmental resolution, Dow cites inaccurate information in its SEC filing"

West Virginia's environmental agency says it's OK for fish there to contain more mercury than the federal EPA recommends -- because West Virginians consume less fish than the national average.

E-mails obtained by the Milwaukee Journal Sentinel show that the FDA relied on chemical industry lobbyists to examine bisphenol A's risks, track legislation to ban it and even monitor press coverage.

Some parents, activists, and health experts are worried that the ground-up used tires in artificial turf may harm kids who play sports on it.

"A lawsuit against DuPont Co. claiming its nonstick Teflon cookware coating could pose health risks to users has been dropped."

"Chicago on Wednesday became the first U.S. city to adopt a ban on the sale of baby bottles and sippy cups containing the chemical BPA."

"New research raises additional concerns about the harmful effects of formaldehyde, a common chemical found in everything from plywood to nail polish, car exhaust and cigarette smoke."

"A U.S. ban on the use of carbofuran in food won't affect production of the pesticide at the Institute chemical plant because most of the product is shipped overseas, officials said Tuesday."

"An empty gasoline tank undergoing repairs exploded Tuesday at a fuel storage facility in rural north-central Arkansas, killing three workers, authorities said."

"The Environmental Protection Agency issued a final rule Monday banning the use of the pesticide carbofuran on food crops, saying it poses an unacceptable health risk, especially to children."