Biofuels

Biofuels are fuels obtained from living organisms and can be used instead of fossil fuels. They are a renewable resource, because more plants can be grown to replace the ones used as fuels.

Burning biofuels
Biofuels include... Burning biofuels adds less carbon dioxide to the atmosphere than burning fossil fuels. This is because the plants that were used to make the biofuel absorbed carbon dioxide from the atmosphere when they grow.
 * plants grown to burned, such as wood
 * sugar cane or sugar beet, which can be converted to ethanol. This can be used instead of petrol, and reduces the demand for petrol.

Carbon neutrality
A carbon neutral fuel is one that doen not increase the total amount of carbon dioxide in the atmoshpere when it burns.

The cycle goes

Carbon dioxide absorbed by plants in photosynthesis > crops made into biofuels > biofuels used in vehicles > carbon dioxide emitted in waste gases.

Biofuels are not carbon neutral, because when it is harvest and transported, carbon dioxide is produced. Also when it is produced into fuel, fossil fuels are used to make it, meaning that more carbon dioxide is added to the atmosphere.

Advantages and Disadvantages
AD- Biofuels are renewable

AD- Biofuels add less carbon dioxide to the atmosphere than burning fossil fuels

DA- Growing crops to make into biofuels means that less land is available for growing food. This leads to higher food prices and may lead to some people being short of food.