Biofuels do nothing to stem global warming. It burns the same as fossil fuels, dumping the same amount of carbon into the atmosphere. It also increases the availability of internal combustion engine fuel which in turn helps drive down the cost of fuel overall keeping the demand for such fuels high. The subsidies are nothing more than welfare for big agriculture. That money can be better spent on R&D for hydrogen fuel cells and solar power that can lead to autonomous power generation for homes and businesses.