"Scientists may have been overestimating China’s emissions of carbon dioxide, the main greenhouse gas driving global warming, by more than 10 percent, because of inaccurate assumptions about the country’s coal-burning, according to a study published on Wednesday."

"Recently released testing results in western Pennsylvania, upstream from Pittsburgh, reveal evidence of radioactive contamination in water flowing from an abandoned mine. Experts say that the radioactive materials may have come from illegal dumping of shale fracking wastewater."

"The 585 earthquakes that Oklahoma had in 2014 was a lot. But this year, Oklahoma has had more than that in less than nine months."

"HOUSTON — With oil prices collapsing and companies in retrenchment, a federal auction in the Gulf of Mexico on Wednesday attracted the lowest interest from producers since 1986."

"The U.S. Environmental Protection Agency on Tuesday proposed new standards to cut greenhouse gas emissions and volatile organic compounds from oil and gas facilities, a key part of a broader strategy to cut methane emissions in the sector by 40 to 45 percent below 2012 levels in the next ten years."

"Democratic presidential candidate Hillary Clinton on Tuesday staked out her opposition to Arctic oil exploration, putting her at odds with the Obama administration one day after it approved drilling off Alaska."

"The impact of low oil prices could have long-term consequences for drilling companies. But hydraulic fracturing technology could allow the industry bounce back more quickly, experts say."

"A Baltimore City Circuit Court judge has ruled that the information railroads submit to the state about the volume and frequency of their crude oil shipments is public."

"The Obama administration is expected to propose as soon as Tuesday the first-ever federal regulation to cut emissions of methane, a powerful greenhouse gas that contributes to global warming, by the nation’s oil and natural-gas industry, officials familiar with the plan said on Monday."

"The Obama administration is giving Shell permission to fully drill an exploratory well in the Arctic Ocean and burrow into potential oil-bearing rock thousands of feet below the seafloor that previously was off limits."