"Natural gas overtook coal as the top source of United States electric power generation for the first time ever this spring, a milestone that has been in the making for years as the price of gas slides and new regulations make coal riskier for power generators."

"A New Jersey judge has rejected a plea from environmental groups to intervene in a pollution settlement Gov. Chris Christie (R) negotiated."

"Before Freddie Gray died of spinal injuries he received in police custody, sparking weeks of protest in his native Baltimore and around the country, he was a 'lead kid,' one of thousands of children in the city with toxic levels of lead in their blood from years of living in substandard housing -- and long-term health problems as a result."

"Three of the candidates in the 2016 presidential race have pledged to shun campaign contributions from the fossil fuel industry."

"Lawmakers are set to grill the nation's top pipeline regulator on Tuesday, as a Houston company works to clean up oil spills in California and Illinois that have highlighted safety concerns."

"One sultry day in 2012 , a handful of New Yorkers laid out a rich red carpet in Union Square Park. As a jazz band grooved in the background, vested and begloved hosts led guests to the star attraction: a drinking fountain. The event, called “Respect the Fountain,” was staged by a group with an unlikely mission — to make water fountains cool again."

"Federal officials this week labeled DuPont Co. a “severe violator” of worker safety rules, after uncovering more safety problems in an investigation launched following a massive toxic gas leak that killed four workers at the company’s La Porte, Texas, plant last November."

"'Extreme.' 'Unprecedented.' 'Historic.' Those are just a few of the words being used to describe the start of this year's fire season in North America."

"President Obama announced on Friday that he was designating new national monuments covering more than a million acres in California, Texas and Nevada, his latest use of executive power to preserve public land."

"A new study shows more Americans will suffer the consequences of extreme heat."