Dive summary:

• Cape Cod Biofuels in Sandwich, Mass. is collecting old vegetable oil from more than 600 restaurants in the area and converting it into biofuels to power local homes.
• The refined oil is blended with heating oil and supplies it to homeowners; the combined product burns cleaner and emits fewer toxins and pollutants.
• Every by-product of the process is used to create energy in one form or another- wastewater and glycerin creates methane gas to run generators and company vehicles run on biodiesel blend.

From the article:

This winter, much of the oil used to cook all the fried clams and onion rings that are so popular on Cape Cod may be repurposed to heat local homes. A Sandwich-based company, Cape Cod Biofuels, is ramping up its efforts to recycle used vegetable oil into biofuel for home heating oil. Marc Watson, one of the founders of the biodiesel conversion firm, which employs seven employees out of a new plant in the Sandwich Industrial Park, likes to joke that he has one of the dirtiest jobs on Cape Cod. "Everything in the plant, including us, is covered in grease," said Watson. "On most days I go home smelling like burnt French fries or fish. ...