Biodiesel Has Cleaner Emissions.
The only alternative fuel to pass the EPA's exacting emissions and health impacts study required by the Clean Air Act is biodiesel. When compared to petroleum diesel fuel, biodiesel emits much less carbon monoxide, particulate matter, unburned hydrocarbons, and sulfates. Additionally, compared to petroleum diesel, biodiesel reduces emissions of cancer-causing substances by as much as 85%. These emissions reductions when using biodiesel in a blend with petroleum diesel fuel are typically inversely proportional to the amount of biodiesel used.
