Three companies – Air Fuel Synthesis, Cool Planet Energy Systems, and Joule Unlimited – are generating comment and controversy for their approaches to creating different kinds of biofuels. They all promise extreme reductions in carbon emissions and lower prices at the pump. Their output could use existing infrastructure for delivery, making them all desire able commodities if their promise can be achieved. Cool Planet Cool Planet Energy Systems claims to be, “The only company producing carbon negative fuels using plant photosynthesis to remove CO2 from our atmosphere.” Its now patented approach recycles its solid products back into the soil, and using more of the liquid fuel products cleans the air more quickly, according to the firm’s web site. The company’s process divides its output from plant-based sources into liquid fuel and bio-char, an activated carbon that can be used as a coal substitute or fertilizer and soil conditioner, in which instance it acts as a carbon sequestration material, reducing the …