Theres no doubt that San Francisco, if not all of California, is ahead of the curve with regards to environmentalism. All things green are coming out of there, but there is definitely some great steps made from all over the world. So we can’t give all the credit to California, but this next one is a beauty.
grease

Turn Your Burger Into Fuel!
From grease trap to power line - Owl Power's Vegawatt
More and more frequently you will find slinking figures in dark alleys, not bent on mugging you, but rather poised to suck away as much grease and vegetable oil as possible from restaurant grease traps to fuel their cars. With rising fuel prices, this grease-thievery is becoming a common practice and not one that restaurateurs are happy to see.
Biodiesel Mythbuster 2.0: Twenty-Two Biodiesel Myths Dispelled : Gas 2.0
Everything you ever wanted to know about biodiesel. While biodiesel is easily the most popular alternative fuel available, it’s commonly misunderstood or misrepresented by inaccurate information. Since the most frequent question I get is, “So what exactly is biodiesel, anyway?“, I decided to write a tome covering all the basics—a one stop shop for all your biodiesel- related questions.