The price of oil has plummeted as a glut of crude sits idle in tankers and in storage. And more oil could be on the way if a nuclear deal removes the caps on Iranian oil exports.
The regulations, which go into effect in 90 days, establish safety measures for wells and for drilling companies to publicly disclose chemicals used in the process.
Gov. Chris Christie is defending the state's $225 million settlement for decades of contamination at two refineries as a "good deal." But Democratic lawmakers and environmentalists say otherwise.
A storage failure at a coal-fired Duke Energy plant sent tens of thousands of tons of ash into a North Carolina river last year. Now, the company wants to move its stored waste to two abandoned mines.
Mexico has opened up its oil and gas fields to foreign investors. But they're slow to enter, as low oil prices, drug violence and other challenges trump the lure of a vast and undeveloped shale bed.
Small communities across the U.S. are struggling to deal with rapid oil and gas development. The influx of workers and activity can strain services and infrastructure. But planning helps.
With memories of the massive BP spill still fresh, residents are hoping to stop offshore drilling and underwater seismic testing. Industry leaders say they follow rules meant to protect wildlife.
A few years ago, Nicaragua was almost totally dependent on imported fuel. Now the country's fierce winds, sun and volcanoes generate nearly half the country's electricity, and perhaps 80 percent soon.
Environmentalists and Democrats have launched investigations into the funding of climate skeptics. Some say the probes are necessary, while others worry they could rightly be seen as harassment.