"The Environmental Protection Agency on Tuesday said the collapse in oil prices has cast doubt on the State Department's conclusion that building the Keystone XL oil-sands pipeline would not cause a big boost in greenhouse-gas emissions."

"Medical experts reacted with alarm Monday as two top contenders for the Republican presidential nomination appeared to question whether child vaccinations should be mandatory — injecting politics into an emotional issue that has taken on new resonance with a recent outbreak of measles in the United States."

"It isn’t on its dying breath, but the J.E. Corette coal-fired power plant, for 40 years Billings’ worst air polluter, could be weeks away from its last gasp."

"For as long as 400-ton dump trucks have been rumbling around the open pit mines of Canada’s oil sands, crews from Kal Tire have been on hand to replace and repair their $70,000, 13-foot diameter tires."

"Anadarko Petroleum Corp., a minority investor in BP's failed Macondo well, is on the hook for federal pollution fines for the 2010 Gulf of Mexico oil spill, regardless of whether the company was responsible for the disaster, a federal judge said Monday (Feb. 2)."

"It is time to strengthen the nation's smog limits to improve the health of millions of people who suffer the ill effects of air pollution, dozens of environmentalists, doctors, asthmatic children and religious leaders told a panel of federal officials Monday at a daylong hearing."

"Mercury levels in yellowfin tuna caught in the Pacific Ocean have been rising at a 3.8% annual rate since 1998, according to a new study."

"In a vote last month 15 Republican senators agreed that climate change is caused by human activity. Only three were ready to state how they would tackle it and none suggested a target for cutting greenhouse gas emissions"

"An overwhelming majority of the American public, including half of Republicans, support government action to curb global warming, according to a poll conducted by The New York Times, Stanford University and the nonpartisan environmental research group Resources for the Future."

"The World Meteorological Organization reported on Monday that 2014 was the hottest year in a historical record of global temperature dating from 1880. That finding confirms an announcement made last month by two American scientific agencies and one in Japan."