DISADVANTAGES Biodiversity – A large amount of arable land is required to grow crops. This could see some natural habitats destroyed including rainforests. The food V fuel debate – There is concern that due to the lucrative prices of bioethanol some farmers may sacrifice food crops for biofuel production which will increase food prices around the world. Carbon emissions – There is debate over the neutrality of bioethanol when all elements are taken into consideration including the cost of changing the land use of an area, transportation and the burning of the crop.