food chain / ocean thermal energy conversion / stored energy / energy source / chemical reactions / wind energy / electricity / energy radiating / gravitational energy / ways energy / model energy system / energy flows / solar energy thousands / food energy / light energy / radiant energy / chemical process / photovoltaic technology / natural gas / solar energy / energy / /
Organization
National Geographic Society / /
Person
Sunny / Steve M. Tomecek / Lynda Sorensen / /
Position
Teacher / Professor / passive solar thermal collector / /