"UNITED NATIONS — After months of negotiations, the United Nations announced Wednesday that U.N. experts will depart imminently for Syria to investigate alleged chemical weapons use."

"Authorities in south Georgia say at least three people have been injured in a chemical explosion that rocked an industrial complex."

"MONTREAL -- Tests conducted by an environmental group suggest last month’s Lac-Mégantic, Quebec, train disaster had a devastating impact on water quality and soil in the affected area."

"Well-meaning home gardeners who buy plants to attract pollinators might be harming honeybees, according to a study that an environmental group released Wednesday."

"At a beef industry conference in Denver last week, the animal health auditor for meat producer JBS USA presented a video showing short clips of cows struggling to walk and displaying other signs of distress. The animals appeared to step gingerly, as if on hot metal, and showed signs of lameness, according to four people who saw the video."

"Kerri was 4 when she started having trouble walking. Justin was 5 when he got a nosebleed that would not stop. Danielle was 7 when her legs began to ache."

"A 27-year-old U.S. program intended to warn the public of the presence of hazardous chemicals is flawed in many states due to scant oversight and lax reporting by plant owners, a Reuters examination finds."

"The Federal Railroad Administration said it is investigating the safety of transporting crude oil by rail, including whether chemicals used in hydraulic fracturing are corroding tank cars."