biblyography
- www.imaginationstationtoledo.org Imagination Station 2015 http://imaginationstationtoledo.org/content/2011/03/can-you-build-an-earthquake-proof-building/
2. www.cleantechnica.com Clean technica2014http://cleantechnica.com/solar-power/
3. http://sciencecityproject.weebly.com/ 2015 http://sciencecityproject.weebly.com/
4.http://pblfinalproject.weebly.com/ 2015 http://pblfinalproject.weebly.com/