National (U.S.)

"A leading U.S. coal regulator announced plans on Tuesday to toughen what it called "out-of-date" rules for guaranteeing mine cleanups."

"Ken Salazar and Jennifer Granholm will be helping to pick agency leaders and map out policy goals and could be in line for top administration jobs if Hillary Clinton clinches the White House."

"The Obama administration on Tuesday finalized new fuel-economy standards for large trucks, buses and other heavy-duty vehicles, the latest in a series of efforts aimed at slashing greenhouse gas emissions and weaning the nation from its dependence on fossil fuels."

"Twelve Democratic attorneys general want a House chairman to end his investigation into state probes of Exxon Mobil Corp."

"Just as scientists are warning that our planet's climate is set to overshoot critical thresholds, Americans have become more divided than ever along partisan lines over global warming."

"The U.S. Chemical Safety Board is joining the investigation into the Friday night fire at Sunoco Logistics in which seven contract workers were injured, including four who were critically burned." The Occupational Safety and Health Administration is already investigating.

"Abandoned pipelines are facing new scrutiny from the Obama administration. The Transportation Department’s Pipeline and Hazardous Materials Safety Administration (PHMSA) issued an advisory bulletin Monday that tightens controls on pipeline operators."

"Long-lasting white trails left behind by aircraft are caused by well-understood physical and chemical processes, not a secret, large-scale atmospheric spraying program, concludes new research from Carnegie Science, University of California-Irvine, and the nonprofit Near Zero."

"The race is on to win President Barack Obama's attention as he puts some final touches on his environmental legacy. Conservation groups, American Indian tribes and federal lawmakers are urging his administration to preserve millions of acres as national monuments. Such a designation often prevents new drilling and mining on public lands, or the construction of new roads and utility lines."

"Combating climate change with investment in renewable power is a main part of Hillary Clinton's economic platform, the campaign's political director said yesterday."