Environment Want Blue Energy? Then Trade Risk for Information There are a lot of unknowns about the ecological effects of ocean-based renewable energy. A screwy permitting process, a new analysis argues, makes answering those questions that much harder. Michael Todd
Environment Rerouting Gray Whales By Audio Researchers are testing a new technology to protect whales from human enterprises by rerouting them. Elisabeth Best
Environment Tilting at Turbines Many environmentalists oppose a "green" idea for tidal power in the U.K. So do British surfers. Michael Scott Moore