novenator writes "Today the Denver Zoo has unveiled the world's first poo/trash-powered motorized tuk tuk. The vehicle also boast a gasification system designed by the zoo itself. From the article: 'The tuk tuk was purchased from Thailand and then re-designed to run on gasified pellets made from animal droppings and waste generated by the zoo's staff and human visitors, according to The Denver Post. The poo-powered tuk tuk is the second prototype The Denver Zoo has put together to show off their sustainable energy system -- the first? A blender used to mix margaritas at a zoo event.'"