free energy - runs on grass & other 'compostable' matter
Posted by Patricia on URL: https://www.es-forum.com/free-energy-runs-on-grass-other-compostable-matter-tp4028215.html
this makes a lot of sense to me.
some people use compost to warm their greenhouses.
the inner compost temperature goes to 140-160 degrees F.
plans for building the system $39
components $200 or less
electricity bill goes DOWN or becomes non-existent.