"The U.N.'s panel of climate scientists agreed on Thursday to study how to limit global warming to the toughest target suggested by world leaders, saying even small rises in temperatures could be harmful."

"New Hampshire says emissions of a chemical used to make Teflon coatings may be the source behind the contamination of more than 40 wells in several towns."

"Among firs and cedars high in the Sierra Nevada, scientists are using an array of instruments to monitor the health of the forest, measure the snowpack and track the water that melts and seeps into the soil. As they collect data, they’re taking snapshots of a landscape in the midst of major changes."

"Detroit Public Schools water test results released Thursday show that 15 buildings have tested positive for high lead levels, including one where a drinking fountain recorded 100 times the allowable limit."

"ExxonMobil Corp. is fighting a subpoena request by the US Virgin Islands, which is claiming that the oil company could have violated the territory's anti-racketeering law by knowingly misleading the government and the public about the likelihood that its fossil fuel business impacted climate change and thus defrauding them. But Exxon vehemently opposes the notion that it knew about climate change before the rest of the world did."

"The Obama administration on Thursday unveiled new oil well control rules to prevent the kind of blowout that happened six years ago on a BP Plc rig in the Gulf of Mexico."

"New study shows that consumption of fast food is linked to higher levels of phthalates, the chemicals used to produce many plastics."

"Chicago's North Broadway Street is always bustling, but in the past few weeks, it has been noisier than ever. There is water flowing from an open fire hydrant, and as traffic inches by, a cement truck backs up and pours concrete down into a big hole in the street."

"Senators on Wednesday reached a deal to act on a comprehensive energy bill as soon as this week, breaking a three-month partisan standoff over the tainted water scandal in Flint, Mich."