Icebergs of Fat, Oil, and Grease Are Growing in the Sewers Beneath Our Feet. Here's Why.
Thanks to wasteful sanitation habits, so-called "fatbergs" have increased in recent years—costing taxpayers in cities around the world a small fortune.
Biodiesel
Waste Cooking Oil From Mexico City's Restaurants Could Power the City's Buses
Biodiesel from the waste cooking oil produced by the capital city's restaurants could help to power the cities public transit system, and reduce emissions in the process.