Global warming and the overuse of available traditional fuels have created an environmental crisis. In Colorado, however, scientists in the windy Rocky Mountains have found alternative fuel sources that could provide a solution. What are these new sources of energy? How can they be used in everyday life? Welcome the sights and sounds of the world with the Footprint Reading Library. Accompanied by original video material developed by National Geographic Digital Media, this is the first non-fiction reading series to present fascinating real-world stories in three formats: print, audio, and video.
