the very best solar energy product that provides energy simply and efficiently...the tree. been working tirelessly on a smokeless wood burning engine for a truck and even working on how to use green wood, you know, to appease the green party.
That was done in WWII due to the unavailability of petroleum fuel in some places. Wood burning ICE engines tapped the partially combusted gasses of burning wood. I’m not sure how they did it, but I do know from reading descriptions that it didn’t work all that well.