A new kind of crop is being planted in the United States, and it doesn't require any land or fertilizer. Farming it improves the environment, and it can be used in a number of ways. So what is this miracle cash crop of the future?
Charlie Yarish, professor of ecology and evolutionary biology at the University of Connecticut, loves seaweed. In nature, he says, when seaweed turns a rich chocolate color, that means the plant is picking up nitrogen, a process called nutrient bioextraction.