Bio-fuels

• Bio-fuels are made from plants and waste
• Bio-fuels are renewable energy sources created from either plant products or animal dung. They can be solid, liquid or gas and can be burnt to produce electricity or run cars in the same way as fossil fuels
• They are supposedly carbon neutral, although there is some debate about this as it's only really true if you keep growing plants at a rate that you're burning things
• Bio-fuels are fairly reliable, as crops take a relatively short time to grow and different crops can be grown all year round
• However, they cannot respond to immediate energy demands. To combat this, bio-fuels are continuously produced and stored for when they are needed
• The cost to refine bio-fuels is very high and some worry that growing crops specifically for bio-fuels will mean there isn't enough space or water to meet the demands for crops that are grown for food
• In some regions, large areas of forest have been cleared to make room to grow bio-fuels, resulting in lots of species losing their natural habitats
• The decay and burning of this vegetation slo increases CO2 and methane emissions