Biodiesel
Biodiesel
is a renewable transportation fuel that can be used in diesel engines as a replacement for, or as a component
of, diesel fuel. Biodiesel is made by chemically combining
a natural oil or fat with an alcohol in a process called transesterification.
Many vegetable oils, animal fats, and recycled cooking greases
can be transformed into biodiesel.
Biodiesel is more environmentally friendly than normal diesel.
It is cleaner burning, nontoxic, and biodegradable. Moreover,
its use results in the release of no additional carbon dioxide
- just the carbon dioxide originally absorbed from the air
by the plants or animals it is made from.
Biodiesel can be legally blended with petroleum diesel in
any percentage. The percentages are designated as B20 for
a blend containing 20% biodiesel and 80% petroleum diesel,
B100 for 100% biodiesel, and so forth. In the US, B100 and
blends of B20 or higher qualify for alternative fuel credits
under the Energy Policy Act of 1992.
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