So it's obvious that alternatives to petroleum and other common fuels are taking ground. We are in that stage where we kind of suck at something on the way to getting really good at something, but we see improvement every day.
One mode of energy production that i dont think gets enough love is the Stirling Engine.
Its basically an engine that runs on the basic principles of thermal dynamics, in that it uses heat displacement to run. Powerful Mini Stirling Engine - TEST
There are a ton of examples of mini desktop engines that people build for fun, but they can and have been scaled up to produce enough power to run a household on and more. There has even been Stirling motor airplanes, though, the power to weight ratio makes them pretty impractical atm.
The heat can be generated in a number of way, from burning fuel, to focusing sunlight, and it just has to be a differential, meaning, you can also cool one side to make it run, if you cant produce more than atmospheric heat.
Idk, it would be cool to have personal household generators that run on a bunch of different fuel types. So you could have it work on solar when there is sun, and something like alcohol when there isnt... Or hell, just burn some newspaper and junk mail.
What are your lofty visions of the future of energy?