Question: could we use star fuel to power a cheese factory

Dave Jones answered on 13 Jun 2014:

All the energy on Earth, one way or another, came from the Sun. Coal, for example, comes from years of compressing old trees under heat and pressure. Those trees only grew because of light from the Sun, and the heat that they were exposed to was because of the Sun heating the Earth. So, because all our fuels come from the Sun, we are already using star fuel to power our cheese factories as well as everything else!