<http://schema.org/about>
"\nPhoto: Youtube\nYou Can Use the Sun as a Source of Heat\nStirling engines are a type of heat engine. They convert heat into mechanical work (you can find out more about how they work here), which means that it is possible to use the sun as a source of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/renewable-energy/stirling-engine-made-with-soda-cans-spins-to-860-rpm-video.html>