Landfills are the nation’s third-largest source of methane, behind agriculture and fossil fuels. And a new study shows many landfills, including those in the Mountain West, are polluting the air even more than they are reporting.

The Interior Department is spending another $90 million on restoring rivers and wetlands across the Western U.S., including several in the Mountain West region.

The Eastern Shoshone Housing Authority was recently awarded almost $8 million in funding through the Bureau of Indian Affairs' Tribal Electrification Program. It aims to build up green electricity infrastructure around the country and will be used to purchase, assemble and install solar for homes on the Wind River Reservation.

Quagga or zebra mussels have been detected in every state in the region except for Wyoming and New Mexico.

Engineering hurdles, high costs and political challenges stand in the way of an easy fix to the West's water shortages. This is Part 1 in the Western Water Myths five-part series.

Beavers are often seen as pests, but recent research in Idaho suggests they play an important role in helping forests rebound from wildfire by creating “refugia” for plants and animals.