Bibliography
http://environment.nationalgeographic.com/environment/global-warming/gw-effects/
http://www.wikihow.com/Be-Eco-Friendly
http://www.carsdirect.com/car-pricing/new-electric-car-costs-vs-standard-gasoline-vehicles
http://www.palmettopower.com/portal/energy/what-are-different-ways-energy-can-be-generated.html
http://gzscienceclassonline.weebly.com/
http://www.wikihow.com/Be-Eco-Friendly
http://www.carsdirect.com/car-pricing/new-electric-car-costs-vs-standard-gasoline-vehicles
http://www.palmettopower.com/portal/energy/what-are-different-ways-energy-can-be-generated.html
http://gzscienceclassonline.weebly.com/