Biofuels can be used for heating, lighting, power and transport.
Photosynthesis occurs in the chloroplasts of cells and the process consists of two stages: light and dark reactions.
There are a number of biological products that can be used as biofuels, including wood, grasses, oils, sugars and starches.
Wood and grasses are good biofuels because they grow relatively quickly.
Biodiesel is produced from oil crops, bioethanol is produced from crops with a high sugar content and biogas is produced from the breakdown of organic matter.