How is Disneyland currently sustainable?

Disneyland has made various attempts in being sustainable. Besides alcohol, the only food or drink banned from sale inside Disneyland is gum. Walt did not want his guests to constantly be stepping in it or picking it off their shoes, a pet peeve he had with other amusement parks. (Fanning, Jim)

In December 2008, Disneyland introduced its new and improved 16 Disneyland Resort trams. These trams transport guests between the two theme parks and parking facilities, and were once fuled by diesel engines. They are now fueled by compressed natural gas (CNG). (Disneyland Transportation)

Many of the plants in and around Tomorrowland are edible, to emphasize a future where gardens do double duty as food sources. This is most noticeable in the bushes along the walkways, which are planted with lettuce, kale and an assortment of herbs. (Fanning, Jim)

The gas street lamps on Main Street are over 150 years old and were bought as scrap, for as little as 3 cents a pound, from St. Louis, Baltimore, and Philadelphia, which had no further use for them.
In December of 1982, the park had to be evacuated due to a power outage, and the gas lamps lit the way for all the guests to exit the park. (Fanning, Jim)
The New Submarine ride was once powered by diesel fuel, but in 2007 Disneyland reopened the submarine ride with a Finding Nemo theme, and changed all the submarines to be electrically powered. (Fanning, Jim) The coral reef in lagoon of the Finding Nemo submarine ride is painted with glass, which is much more environmental friendly than paint. Over 30 tons of recycled glass, in over 40 different colors were used. The glass will last a lot longer than your traditional underwater paint. (Fanning, Jim)