Wind Solar PV Solar Thermal Geothermal Tidal Hydroelectric
This presentation is from nationalgeographic.com and all links from this presentation go to pages off this site.
Presentation from National Geographic Society website.
Available at: http://environment.nationalgeographic.com/environment/global-warming/wind-power-interactive.html
James Balog, 2007, Mer De Glace Glacier[electronic image]
Available at: http://www.environment.nationalgeographic.com
Accessed 27 February 2009