"The United States on Tuesday accused Syria’s government of a chlorine gas attack on civilians in the same rebel enclave hit more than four years ago by the deadliest known chemical assault in the Syrian war."

"OLYMPIA – Local fire departments could be banned from using a group of fire-fighting chemicals that are contaminating some wells in Airway Heights and other water sources near military bases."

"A top manager who supervises the Environmental Protection Agency program responsible for cleaning up the nation’s most contaminated properties and waterways told Congress on Thursday that the government needs to plan for the ongoing threat posed to Superfund sites from climate change."

"Microbial activity in a Baltimore stream is unaffected by exposure to the antibiotic ciprofloxacin, evidence that sewage contamination of urban waterways may be fomenting pockets of antibiotic resistance, researchers reported last week in the journal Ecosphere."

"Concern continues to grow over the environmental impact of Hurricane Harvey on the Houston area, home to more than a dozen oil refineries."

"Melting permafrost carries unknown dangers for Arctic marine life."

"The federal government's top fisheries experts say that three widely used pesticides — including the controversial insecticide chlorpyrifos — are jeopardizing the survival of many species of salmon, as well as orcas that feed on those salmon."

"U.S. EPA appears to no longer be releasing preliminary assessments of potentially hazardous new chemicals or new uses of existing chemicals, according to documents reviewed by E&E News."