Rocket-stove heating in homes where people want to save energy...uses about 1/3 of the fuel and also burns much of the pollutants that generally go into the atmosphere from other types of wood stove.
@SW-User I'd also have a company manufacturing outdoor rocket stoves, you can use all sorts of yard waste for fuel, including twigs, small branches (like from tree trimming, wads of dried weeds, even dry corn cobs)....and for those who want to use a greenhouse year round to grow veggies...a rocket stove to heat them or other free energy to heat and light them.
