Located in southern California, HNO Green Fuels, Inc. is a manufacturing, distribution, and research and development company specializing in reducing particulate matter emissions in combustion engines, improving combustion efficiency and fuel economy, and producing breathable oxygen. HNO stands for "Hydrogen and Oxygen", the two main components of water (H2O), which is the extremely abundant catalyst that we use to increase the combustion efficiency of Hydrocarbon based fuels.