Other fuels include bio-gas (methane) from anaerobic digestion of food and slurry waste.

Liquid bio-fuels like bio-diesel from rapeseed oil or flexi-fuel like bio-ethanol from creamery waste whey or cellulosic wood based feedstock, producing second generation ethanol. Importing ethanol or bio-diesel is not a good solution. It is often made from corn which is very energy intensive and CO2 emitting. It can cause deforestation to rain-forests and food and water shortages in poor countries. It also means importing this fuel like our oil, gas and coal.