Currently, six turbines off the coast of Rhode Island account for the lion’s share of the U.S.’s offshore wind energy production, providing 30 megawatts of electricity, or enough power to supply about 5% of the homes in one of the country’s smallest states. In less than three decades, though, researchers believe that massive offshore turbines could be producing more than 10,000 times as much energy, enough to supply up to a quarter of the country’s future electricity demand.