Assignment Earth: Alaska's Pebble Mine

Video: A planned gold and copper mine could pose a serious threat to sockeye salmon population.

Mr. President goes to Yellowstone

Video: See never-before-seen footage of President Obama and his family's visit to Yellowstone National Park in the summer of 2009.

Assignment Earth: Jaguars in peril

Video: The capture and death of the last known wild jaguar in the U.S. raises new concerns.

Plight of Pacific Salmon uncertain

Video: A strong salmon run is not only key for communities in the Northwest and Canada, it's also a primary source of food for more than 100 species. Tom Brokaw reports.

Livability and sustainable communities

Video: The White House hosts a Clean Energy Economy Forum focusing on creating jobs and spurring development by creating more livable and sustainable communities.

Beetles threaten British Columbia's evergreens

Video: Armies of mountain pine beetles are eating their way through the region's vast forest of conifers, and the damage is monumental. NBC's Tom Brokaw reports.

Assignment Earth: Tougher drilling rules on public lands

Video: The federal government has issued new rules for gas drilling against opposition from the oil and gas industry.

DJ spins energy issues

Video: DJ Biz Markie can spin some good tunes, but he took to Capitol Hill Wednesday to spin for the issue of clean energy.

Captain Planet: Ted Turner's agenda?

Video: Nick Boxer says he laughs at the idea that he was a pawn in Ted Turner's grand agenda in creating 'Captain Planet.'