. >> reporter: for the developer's side of the story, we talked to mark rodgers. he says wind power is an idea whose time has come again. >> the cape and islands have a long history of using windmills back in the day. there were once 1,000 windmills here. and by using today's modern wind turbines to make electricity, we can have cleaner air, we can create good jobs for the young people here that pay well and also mitigate climate change. >> reporter: after the gulf oil spill disaster, the need for cleaner energy sources became even more urgent. that's something we all can agree on. >> we really need more clean energy and i think wind farms seem like a perfect way to do it. >> reporter: but, it's easy to see why so many people want to protect the natural beauty of this horizon. >> everyone supports renewable energy. that's a no-brainer. but only in places where it makes sense, only in places that don't have the conflicts that this one poses. >> reporter: one conflict is whether the wind farm will interfere with navigation for boats and air traffic. >>> it would rea