Global warming is most often discussed as a future issue but the evidence points convincingly to the fact that it is already a reality. We simply burn too much coal, oil and gas. The good news is that renewable energy production has made significant inroads into our energy mix. But there is a catch - renewable energy is mostly intermittent; the wind does not always blow and the sun does not always shine. And so energy storage has a crucial role to play in any renewable energy future. This talk addresses these issues from an unconventional starting point that focuses not on technologies but on availability of resource. Renewable energy production, whether it be solar power, wind energy or hydroelectricity, is based on sun, air and water, the global energy commons. In this talk, I will discuss the potential also to develop energy storage options that use only these global commons, these Aristotelean elements. Powering our planet with sun, air and water can offer us a very optimistic future.