"State and federal  investigators on Sunday began their  first in-depth look at the cratered epicenter of a fertilizer plant explosion that killed at least 14 people, including about 10 volunteer firefighters and the residents who tried to help them extinguish a fire at the site."

"The U.S. Federal Energy Regulatory Commission proposed to revise its cybersecurity standards for the nation’s electric grid, expanding the rules to more than 60 additional companies."

"CHARLESTON, W.Va. -- Coal operators can and should take more aggressive steps to reduce dust emissions from blasting and heavy equipment at mountaintop removal mines, according to new studies released this week as part of a controversial industry-funded research project."

"BILLINGS, Mont. -- Internal investigators faulted the Environmental Protection Agency on Thursday for years of delays in completing health studies needed to guide the cleanup of a Montana mining town where hundreds of people have died from asbestos exposure."

"WASHINGTON, DC -- Support for global action to curb climate change is growing stronger within the G8 group of the world’s largest industrial democracies, which includes the United States and Japan."

"WASHINGTON -- A dozen states and cities and three major environmental groups have notified the Environmental Protection Agency that they plan to sue the regulator unless it issues final rules limiting greenhouse gas emissions from new power plants."

"U.S. construction workers, environmentalists and company executives squared off on Thursday at a raucous meeting on the Keystone XL oil pipeline, but it was unclear the gathering changed any minds on the controversial project."