National (U.S.)

"The record-breaking cold weather in the US doesn't mean the globe isn't warming, scientists say."

"Javier Sepulveda watches the cockroaches skitter across the floor of his Harlem apartment with a mixture of anger and angst. For him they are more than just a nauseating nuisance: They’re one of the main reasons his 12-year-old daughter, Melissa, sometimes struggles to breathe with the scary sensation that she’s suffocating."

"One takeaway from the Administration’s 2014 Climate Action Report is that for a host of reasons, some planned and some by luck/market forces, the US is in a better place in greenhouse gas emissions than it was in 2005."

"SAN DIEGO, California -- Seventy-one U.S. Navy sailors from the aircraft carrier USS Ronald Reagan are filing suit against the Japanese utility Tokyo Electric Power Company, TEPCO, after they were allegedly exposed to radiation from the Fukushima Daiichi nuclear power plant when they arrived in Japan with aid."

"LAKE MEAD, Nev. -- The sinuous Colorado River and its slew of man-made reservoirs from the Rockies to southern Arizona are being sapped by 14 years of drought nearly unrivaled in 1,250 years."

"WASHINGTON -- Five years before a train loaded with crude oil derailed and exploded last year in Quebec, killing 47 people, another derailment in Oklahoma should have given federal regulators an early warning that the type of oil both trains carried was more flammable than authorities realized."

"Federal regulators are unlikely to step up enforcement of potential water contamination cases linked to natural gas drilling -- despite new concerns about water safety -- given a lack of political will and limited resources to pursue such cases, analysts said."

"Associated Press review of complaints casts doubt on industry view that it rarely happens."

"CHICAGO -- Snow-covered roads, high winds and ice were creating dangerous driving conditions Sunday from the Dakotas to Missouri to Delaware ahead of a 'polar vortex' that'll bring below-zero temperatures not seen in years to much of the nation."

"The U.S. government is planning stricter controls on exposure to silica, a carcinogen found in workplaces ranging from dentist's offices to granite quarries, according to a new report."