To protect depleted populations of Atlantic herring -- a vital food source for larger fish, whales and other marine life -- Federal authorities consider banning large trawl fishing boats from the inshore Gulf of Maine during summer spawning months.
There's wide support for giving federal protection to Snake River headwaters in Wyoming, but farmers downriver in Idaho worry this could mean less water for crops.
U.S. wildlife authorities have reintroduced a rare sub-species of gray wolf in Arizona and New Mexico, but cattle interests, political pressures and poachers have all but doomed the recovery program.
Some scientists suspect that pesticides are the cause of plummeting bee populations, which could have serious consequences for pollination and production of food crops.
The western United States is rich in renewable solar and wind energy, but delivering it to consumers will require huge investments in new transmission lines that could cause serious environmental impacts.
Investigators claim smugglers have shipped endangered chimpanzees and gorillas from Africa to buyers in the Middle East. They blame governments, airlines and international law enforcement for failing to protect Africa's great apes.
An ambitious plan for a giant wind farm project off the the coast of Cape Cod in Massachusetts has divided environmentalists and pitted residents against each other.
Taking his passengers to an altitude that reveals the extent of its impact on the land, one pilot hopes to make people understand how oil and gas drilling is transforming America's western landscapes.
Sportsmen, native communities and conservationists unite in opposing a Canadian company's plan for a huge gold and copper mine in a watershed criticcal for spawning salmon.
