The article estimates emissions from land use changes caused by producing first and second generation biofuels. Different factors affect these emissions, such as the type of biofuel and the land used. Energy crops like miscanthus have lower land requirements than switchgrass. Including cropland pasture emissions significantly increases total emissions. The emissions vary greatly depending on the emission factor source used. Cellulosic ethanol produces more emissions than bio-gasoline from dedicated crops according to some factors.