According to the IPCC between ten and fifteen percent of total global cropland is available for biomass production specifically for energy and transport. The greatest advantage of hemp cultivation, as a method of climate change mitigation, is the comparative ease with which it could be integrated into the existing fossil fuel economy.
With the ability to be grown at all but the very coldest latitudes, hemp could form the basis of an internationally distributed yet locally produced fuel industry. Hemp-based ethanol would not only be a complementary product to the oil economy (combining ethanol with gasoline increases quality of gasoline and produces significant environmental benefits), but could also be used as a direct replacement because it can be used with existing technologies. It is also the only biomass crop that can add to the food production of land rather than replacing food production, as other biofuel crops, such as corn, triggered global food riots.