Dokument popisuje alternatívne zdroje energie
[embedplusvideo height=“418″ width=“695″ editlink=“http://bit.ly/17Cv67l“ standard=“http://www.youtube.com/v/etvhmpdtUfw?fs=1″ vars=“ytid=etvhmpdtUfw&width=695&height=418&start=&stop=&rs=w&hd=0&autoplay=0&react=1&chapters=¬es=“ id=“ep5829″ /]
