EmbedVideo(7877, 514, 320); In an unlikely alliance, natural gas companies and environmentalists have decided to work together to make fracking safer. Rick Karr travels to Pennsylvania to explore the tensions this has created among environmental groups.

.embed-container { position: relative; padding-bottom: 2.25%; padding-top: 30px; height: 0; overflow: hidden; max-width: 100%; height: auto; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } NewsHour Weekend's Tracy Wholf explores…

Greenland's parliament voted to overturn a 25-year-old ban on uranium mining on the island nation, the Associated Press reports. Lifting the ban on uranium mining will allow the country to unearth rare earth metals as well. Greenland is…