"As negotiators headed to Copenhagen in December 2009 to forge a global climate pact, concerned U.S. business leaders and liberal luminaries took out a full-page ad in the New York Times calling for aggressive climate action. ... One of the signatories of that letter: Donald Trump."

"Low-elevation snowpack across the Rocky Mountains, the Sierra Nevada and the Cascades will disappear in the coming decades if global warming continues unabated, according to a new study. The changes will cause water shortages in the region and dry out forests and grasslands, the study's authors say."

"The U.S. solar energy market will nearly double new installations this year to 14.5 gigawatts, led by utility projects that developers scrambled to bring online in anticipation of the expiration of a key federal tax credit, according to a report published on Thursday."

"The House on Wednesday passed a bill to reauthorize the federal pipeline safety oversight board."

"Cases of Legionnaires' disease nearly quadrupled in the United States over a 15-year period, and almost all might have been prevented with the proper use of disinfectant, the right water temperature and other measures, federal health officials said Tuesday."

"At DOT's headquarters in Washington, D.C., the agency's Pipeline and Hazardous Materials Safety Administration (PHMSA) hosted an in-depth discussion of what went wrong during a March 2014 explosion at an LNG facility in Plymouth, Wash., that led to five injuries and $72 million in property damage."

"U.S. EPA has issued its first-ever guidance on contamination in drinking water in the wake of a nuclear disaster, 'dirty bomb' or other radiological accident, drawing criticism from public health and environmental groups."

"In California, there is so much solar energy that grid operators have to switch off solar farms. One solution of dealing with the additional power generated is to share the renewable wealth across state borders – but in the West, it's sparking some not-so-neighborly opposition."

"Regulators are wrangling with bankrupt coal companies to set aside enough money to clean up Appalachia’s polluted rivers and mountains so that taxpayers are not stuck with the $1 billion bill."

"The Senate on Tuesday gave final approval to an overhaul of the nation’s 40-year-old law governing the use of toxic chemicals in homes and businesses, sending the bill to President Obama for his expected signature."