People, Prosperity and the Planet (P3). Sounds like a nice collection of "P" words, no? It's also an annual call from the Environmental Protection Agency (known simply as the Agency by some) to finds innovative solutions to a dirty world. The EPA has announced the winners of this year's P3 competition - which is open to college students and teams - and two biodiesel projects are among them. Both Loyola University of Chicago and Drexel University will get their $75,000 prizes for biodiesel projects. Loyola's winning entry will allow the student to build a lab that will turn cafeteria vegetable oil waste into the biofuel. Over at Drexel, the students have developed a biodiesel reactor that uses bubbling alcohol vapors and acid catalysts to prevent soap formation and is therefore able to make biodiesel more efficiently. Other schools won for their work on treating wastewater and disinfecting drinking water, among other things. Read more about the P3 winners after the jump and on the EPA website.