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Seaweed may well be an ideal plant to turn into biofuel. It grows in much of the two thirds of the planet that is underwater, so it wouldn't crowd out food crops the way corn for ethanol does. Because it draws its own nutrients and water from the sea, it requires no fertilizer or irrigation.

This summer, the entrants in the Oil Removal X Challenge were put through their paces in an oil-filled pool. This is what it looked like. This past summer, the 10 finalists in the the Wendy Schmidt Oil Cleanup X Challenge spent their days in a pool at The National Oil Spill Response Research & Renewable Energy Test Facility in New Jersey, trying to remove oil from water.

Jellyfishes rely on drifting to eat.

Microscopic algae and the nearly invisible animals that eat them do more than just drift along the ocean surface. Plankton , defined by their habitat, not their taxonomy, are the foundation of the marine food chain--without them, marine life would go hungry and food chains would collapse. They also remove carbon dioxide from the sea and provide Earth's atmosphere with oxygen