The floating environmental greenhouse on the Hudson River in New York is educational as well as environmental. Visited by school children and adults this naturally powered greenhouse grows vegetables hydroponically. The plants on this floating environment get all their nutrients from water instead of soil so they can adapt easily to urban environments where soil may be unhealthy, hard to find, or nonexistent. Read more about this incredible floating environment here:
http://news.nationalgeographic.com/news/2012/07/pictures/120726-green-tech-city-building-solutions-urban-heat-island/#/city-solutions-green-buildings-floating-laboratory_57161_600x450.jpg
