On the shallow edge of the marsh, the Great Blue Heron stands. Salt Marsh Diary writer Mark Seth Lender watches, transfixed by the majesty of the large wading bird.

Millions of tennis balls end up in the trash every year, sometimes after just hours of actual playtime. When a ball loses air pressure, it’s out of the game – until now. Living on Earth’s Bridget Macdonald reports on a company that is giving old tennis balls a second shot on the court.

Bark beetles have eaten their way through millions of acres of forest in the West. Host Jeff Young talks to audio engineer David Dunn and researchers Richard Hofstetter and Reagan McGuire about using sound to combat the infestation.

Now that the Yucca Mountain repository is all but shut down, where does the high level waste go? Host Jeff Young talks with Dr. John Garrick, chairman of the Nuclear Waste Technical Review Board, to find out what other nations are doing with their radioactive spent fuel.

British Prime Minister Gordon Brown is considering setting aside a pristine patch of the Indian Ocean as the world's largest marine sanctuary. Rachel Jones, a researcher at the London Zoological Society Aquarium, has been an advocate for establishing the park. Host Jeff Young speaks with her about the tuna boats, military base and Chagosian people that would be affected by the proposed sanctuary.

Thousands of fishermen rally at the nation’s capitol demanding changes in fishery law. They say tight catch limits could sink their businesses even as fish stocks are rebounding. But scientists warn against a return to policy that brought about the collapse of many fish populations. Host Jeff Young explores ways to chart the right course for our fragile fisheries.

President Obama’s decision to cut federal funds for the Yucca Nuclear Waste Repository leaves operators of the nation’s reactors holding more than 120 million pounds of high level waste. Federal officials say that the waste is safe, but critics say spent fuel pools are vulnerable targets for terrorists. Several State Attorneys General are suing to change that. Senior Correspondent Bruce Gellerman investigates the Pilgrim reactor in Plymouth, Massachusetts.