VIA boingboing.com: Disneyland has switched the old time locomotives that pull the Disneyland Railroad to biodiesel:
For Disneyland, the switch to biodiesel saves as much as 150,000 gallons of diesel fuel each year, while potentially reducing carbon dioxide emissions by up to 80 percent, Disneyland Resort spokesman Bob Tucker said Monday.
"The decision, once we knew the trains would perform well, was an easy one," said Frank Dela Vara, technical director for Disneyland's Environmental Affairs.
(via The Disney Blog) http://www.thedisneyblog.com/