Can you travel around the world without spending a dollar on gas? A school teacher from Switzerland has done just that. He has built a solar taxi that primarily uses solar energy to power the car with backup energy coming from plugging the car into a grid while at rest. Energy is [...]

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Biodiesel is a renewable fuel produced from agricultural resources such as vegetable oils. In the United States, most biodiesel is made from soybean oil; however canola oil, sunflower oil, recycled cooking oils, and animal fats are also used.
How It’s Made
To make biodiesel, the base oil is put through a process called “esterificiation.” This refining method [...]

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