"In the latest legal showdown over the Dakota Access pipeline, federal judges seemed skeptical today of American Indian tribes' arguments for extending a work freeze on a contentious stretch of land in North Dakota."

"Polychlorinated biphenyls, or PCBs, are industrial chemicals so toxic that Congress banned them 40 years ago. Research has shown that they can cause a range of health concerns, including cancer and neurological problems such as decreased IQ. And yet, because they were commonly used in building materials for decades, they continue to contaminate classrooms in between 13,000 and 26,000 schools nationwide, according to Harvard researchers."

"President Barack Obama on Wednesday said the U.S. government has teams and supplies positioned to respond to Hurricane Matthew as the storm barrels toward Florida and other southeastern states." Millions were told to evacuate in Florida, Georgia, and South Carolina.

"Exxon’s ambitious work on powering clean vehicles 40 years ago parallels its cutting-edge research on climate change during the same era."

"Americans’ views on climate change diverge sharply depending on their political affiliations, says a new Pew Research poll. But two areas of consensus are emerging."

"Capping a day-long futurist fair and alternative music fest on the South Lawn of the White House on Monday, President Obama told actor Leonardo DiCaprio and atmospheric scientist Katharine Hayhoe 'we’re really in a race against time' to curb the worst affects of climate change."

"The choice between Hillary Clinton and Donald Trump holds U.S. climate policy, and the Paris agreement, in the balance."

"The nation’s top health officials on Monday laid out their plans for spending $1.1 billion in newly appropriated federal funds to combat the threat posed by the Zika virus."

"President Vladimir Putin suspended a 16-year-old deal with the United States to dispose of weapons-grade plutonium on Monday, further calling into question the future of the beleaguered mixed oxide facility at the Savannah River Site in South Carolina."

"Volkswagen has agreed to pay its U.S. dealers up to $1.2 billion to compensate them for losses suffered as a result of the company's emissions cheating scandal, according to a settlement agreement filed Friday in federal court in San Francisco."