aquaculture

Aquaculture is growing in popularity around the world, but the high density of waste created by fish farms poses an environmental threat. David Love, a project director at the Johns Hopkins Center for a Livable Future, is trying to solve this problem through aquaponics -- the recycling of fish waste to feed vegetables growing on rafts.

Cownose rays dining on oysters.  Photo courtesy of Robert Fisher/Virginia Insitute of Marine Science.

Could new research on HIV treatment turn the tide of the AIDS epidemic? Plus, a look behind the delays in introducing aquaculture to the Chesapeake. And, the writer Dudley Clendinen speaks with Tom Hall, and his doctor Jeffrey Rothstein, about the different treatment options available for people with ALS — and how his life will change if he decides to try one.