This invention comes from Japan, and is able to convert plastic bags into crude oil. As a matter of fact, plastic bags ARE made of oil. The bags are heated in the machine, and it traps the vapors with a system of pipes. Then, these vapors are condensed into crude oil, which can be used to heat the home. The initial price is kinda high, $10.000, but the inventor believes that the price will fall as the demand for the device increases. Currently, it is sold by the Blest Corporation. Read more here.