Take a look at its website http://www.52businesses.com/ and see how it finds the various resources it needs to achieve its goal. Many of the business ideas are actually very simple, building on an existing product, service or distribution channel.
Browse the 52 businesses and let yourself be inspired!
In this thread, share one example of the 52 businesses that you like. How could you adapt the idea to the renewable energy field? Or perhaps one of the ideas triggers something new?
Brainstorm with other learners and see what ideas you can come up with.