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

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

Video: If this invasive fish with a voracious appetite reaches the Great Lakes, there could be environmental and economical devastation.

Video: Researchers monitor underpass crossings to determine if grizzly bears and other animals can cross the roadway safely.

Video: Once almost hunted to extinction, North America's largest native waterfowl is making a comeback.

Video: Hundreds of miles of barbed-wire barriers are replaced to help with antelope migration.

Video: An oyster farm changes its practices and becomes more environmentally friendly.

Video: This monument faces unique security and pollution problems arising from illegal immigration across its terrain

Video: Lab-raised mussels are released into wild streams with hopes to increase their population.

Video: Some loggers and environmentalist discover that working together can solve more problems.