. >> one of the wind farms we use is the shilo wind farm and that is large enough to be able to providenergy for up to 200,000 homes. >> our mission is sustainability, even though our bikes are minimal energy use, it still matters where the energy comes from and part of our mission in sustainability is how we run everything -- run our business. having the lights come on with clean energy is very important. >> the sunset reservoir has solar panels that take up about four city blocks covering the reservoir and the solar power generates energy for city resources and clean power sf for residents participating in the program. >> it was easy to sign up for the program, i went online to cleanpowersf.org and i started getting pieces in the mail letting me know i was going to be switched over and it just happened. when i pay my bill, i still go to pg and e and i don't see any difference between now and a year ago. >> sign up online, just have your account number ready and it takes about two minutes and there's nothing to install. no lines are getting connected to your home. all the power goes th