Biodiesel is a renewable alternative energy source that is produced from used cooking oil, vegetable oil or soybeans. It is called "biodiesel" because it can be used in current diesel engines of all kinds. This type of fuel is better than standard diesel fuel because of its purity, lower emissions and cleaner exhaust gases. Related industries involved in the production of this type of fuel usually contribute to the improvement of local economy due to the production of this type of fuel that can be planted anywhere. Having facilities for processing and production of this fuel reduces the need for countries to import oil and other fossil fuels.