"The Trump administration official leading the Environmental Protection Agency’s research office took part in conversations about a health assessment of formaldehyde even while planning to recuse himself from the issue because of his previous work for one of the country's biggest producers of the toxic substance."

"A towering explosion at a century-old Philadelphia oil refinery earlier this year released 5,239 pounds of a hydrofluoric acid, federal investigators said today, the first time they have seen releases of the potentially deadly chemical during a refinery blast."

"A new national database for clean business says U.S. industry is leading the way, but China isn’t far behind."

"The Pentagon’s inspector general is examining the military’s use of a dangerous but ubiquitous class of man-made chemicals that has leached into the drinking water of millions of Americans, including many living near military bases across the country."

"After two days of deliberations, an unofficial panel of air quality experts has tentatively concluded that EPA's fine particulate matter standards need significant tightening. Though agency leaders may not pay heed to their findings, the panel members are optimistic that federal judges will listen."

"What was billed as an extraordinary event launched this morning [Thursday] in the most mundane of surroundings: a neutral-toned conference room that featured scientific researchers seated around a makeshift table."

"The Trump administration on Thursday proposed new regulations on lead and copper in drinking water, updating a nearly 30-year-old rule that may have contributed to the lead-tainted water crisis in Flint, Mich., that began in 2015."

"Beginning in early 2020, California will ban the sale of the pesticide chlorpyrifos which state environmental officials say has been linked to brain damage and other health defects in children."

"Presidential candidate Elizabeth Warren is taking on climate justice in her newest campaign proposal. On Wednesday, the 2020 hopeful released a plan to combat climate change by centering the experiences of people of color."

"Partially inspired by the Flint, Michigan, water crisis, the Environmental Protection Agency announced a new rule to reduce exposure to lead from drinking water around the country on Thursday."