6.5% of the nation's electricity. and more growth is expected. specifically in our nation's oceans. in 2016, the first commercial offshore wind farm began operations with five turbines off block island in rhode island. and according to the american wind energy association, 10 more farms could be up and running as soon as 2024. >> all right. this is block island. >> aaron drove us to get a better look. you may look at this and say it's just five wind mills, who cares? this could be the start of thousands of these up and downtown east coast of the u.s., some of them much larger than what you see in front of you. >> the impact from five is not going to be the same from the impact of 500 or 5,000. however, there have been impacts. >> where are they seeing the impact? on the fish? >> fish have different habitats. they have certain migratory route these repeat year after year after year. when you put the wind farm on those places, those fish are definitely most certainly impacted. >> on the boats. >> we're trying to navigate, now we have to be avoiding a