As of 2009 the United Sates produces over a 100000000 gallons a year of waste vegetable oil. Waste Vegetable Oil (WVO) that is filtered can be used straight in diesel vehicles that have been converted to cool the oil, or bio-diesel can be used with no conversion to the vehicle at all. Bio-diesel refining involves some toxic substances – methanol for example – and reduces the cost differential between conventional and recycled fuel. However it still makes use of a waste product as an alternative to new petroleum consumption. One wvo recycling company in Colorado EPR inc. has an oil collection service that will collect restaurant or food service WVO on a regular basis for free. Company’s like RecycleMyOil.com provide collection services with restaurants/food service to collect and re-allocate WVO (with or without further refinement) for things like cars,trucks, and even heating units in Garages and Sheds. One thing that you should know is that diesel trucks created greenhouse gases. The recent fuel prices are cause for ingenious ways to act responsible environmentally speaking and one way, is to use waste vegetable oil as a renewable supply of fuel for vehicles. There are so many benefits of using this supply to replace fossil fuels and some of these include abridged air pollution, abridged greenhouse gas emissions, and conservation many other valuable resources found on the planet. There are two different ways that you can use vegetable oil as a fuel in engines. The first way is that you can use straight vegetable oil either waste frying oil or fresh- pressed oil, however you will need an extra fuel tank and a system for heating and filtering the oil before it reaches the engine. There is one reason why and that is to heat the oil, in its normal state it is too thick. The other way is to simply convert the vegetable oil into bio-diesel, which can be used in a diesel engine without any modifications. Bio-diesel is a fuel resource made from vegetable oil when a chemical reaction occurs between methanol and lye. You can create it from waste vegetable oil that can be collected from most restaurants, or you can use fresh pressed oil but that can be costly. This is something that is now being made to sell commercially in thousands of countries all around the world, however with the right equipment and enough time it can also be made right at home. Some of the toxic air pollutants that are concentrated include soot, particulates, carbon monoxide, and sulphur oxides, however nitrous oxide emissions may increase slightly.