"BOSTON -- Concerns have cropped up in recent years that the methane leaks from oil and gas fields could be large enough to pose a significant climate threat."

A new study, still tentative, suggests that climate change will have much worse effects on global food production and supply than experts have previously estimated.

"LONDON -- The cause of much of the recent extreme weather across the world is climate change triggered by human activities, scientists say. The paper suggests that man-made climate change is repeatedly disturbing the patterns of airflow around the northern hemisphere."

"BP Plc fostered a culture that put cost-cutting over safety before the deadly 2010 Gulf of Mexico oil spill, a noted forensic engineer said in the first day of testimony in the federal civil trial centered on the disaster."

"High levels of a dangerous toxin found in bagged dog food on a grocery store shelf in Iowa have highlighted the prevalence of a problematic mold in last year's U.S. corn crop, as state and federal officials work on limiting the food safety concern."

"War has erupted between clean-air activists and state leaders, with the battleground being the data driving decisions about Utah’s air quality."

Researchers and campaigners claim that some 40 percent (19,200) of the children born to mothers taking the epilepsy drug Epilim have developed physical or mental problems.

"A California senator's decision to quit and jump to Chevron Corp. has sparked questions about whether he should have negotiated for that job while in a position to help the company politically."

"After nearly two decades of pollution problems and financial woes, a tire incinerator in one of Illinois' poorest communities will close permanently as part of a legal settlement announced Monday by federal authorities."

"WICHITA -- Years of drought are reshaping the U.S. beef industry with feedlots and a major meatpacking plant closing because there are too few cattle left in the United States to support them."