"Favorable weather conditions at breeding grounds for monarch butterflies in Mexico are expected to help raise their numbers to possibly more than 100 million this year, about triple of a few years ago, a study released on Thursday said."

"State officials formally declared the Aliso Canyon gas leak capped Thursday, but uncertainty remains about the future of the facility and the residents who live around it."

"Minnesota’s moose continued their long decline in 2015."

"Railroads that haul oil trains through Washington state will need to report whether they could afford around $700 million to pay for a derailment and spill, under a recently finalized state rule."

"The Ohio Environmental Protection Agency fired two employees in its Columbus office on Wednesday, and demoted a third employee in the EPA's northeastern district over lead contamination in the Mahoning County village of Sebring."

"A program that has allowed U.S. coal companies to forego cleanup insurance on massive western mines is flawed and needs to be fixed, Wyoming officials have told federal regulators."

"There was a huge global spike in one of the most potent greenhouse gases driving climate change over the last decade, and the U.S. may be the biggest culprit, according a new Harvard University study."

"Federal regulators say corrosion on the outside of an oil pipeline was the cause of a major crude spill on the Santa Barbara coast last year."

"The Sooner State has switched strategies, limiting not just the depth, but amount of wastewater than oil and gas producers can pump back underground."

"The prospect of President Barack Obama tapping Sri Srinivasan for the Supreme Court is spawning a sharp debate among at least one part of the Democrats’ liberal grass roots — environmentalists turned off by his high-profile defense of giant fossil fuel companies."