Biofuels are fuels in the form of a liquid, solid, or gas, which is produced by converting the biomass, such as the production of bioethanol from sugar cane or corn, charcoal, wood chips, or biogas from anaerobic decomposition of waste. Note: FAO distinguishes between primary biofuels such as firewood, wood chips and pellets, are those where the organic material is used essentially in its natural form (as harvested). Such fuels are directly combusted, usually to supply cooking fuel, heating or electricity production needs in small- and largescale industrial applications. Secondary biofuels in the form of solids (e.g. harcoal), liquids (e.g. ethanol, biodiesel and bio-oil), or gases (e.g. biogas, synthesis gas and hydrogen) can be used for a wider range of applications, including transport and high-temperature industrial processes.