Eggplant Cafe. Excess produce is available to students in the interdisciplinary program, titled "The Practice of Sustainable Agriculture". Proceeds from the sale of the crops are used to finance farm projects, as well as purchase seeds and equipment. Two of the greenhouses, the cooler, compost shed, farm fencing and orchard are just a few projects made possible from farm sales. Another use for money generated on the farm is to fund student projects. Many of these projects are related to horticultural aspects of food crops. The farm production area is divided into sections that are used to delineate cropping areas for specific types of crops. The farm practices a strict five year crop rotation. The rotating of crops creates plant diversity over time as opposed to plant diversity in space. The rotation has four general crop categories with each category occupying a given space for one growing season. Crop rotation is just one method the farm uses to maintain diversity in the field. Other methods employed are the use of undersown ground covers and inter-cropping different types of vegetable crops. Creating diversity in the field is one of the cornerstones of sustainable agriculture. Diversity provides non-toxic, sustainable crop protection against plant diseases and insect pests. The Evergreen Organic Farm hosts a large composting facility that composts all compostables from the campus. It also hosts a Biodiesel facility, a community garden, demeters garden, and a large farmhouse that was partially built by students. Public service centers The Evergreen State College is the home of the Longhouse Education and Cultural Center. The Longhouse exists to provide service and hospitality to students, the college, and surrounding Native communities. With a design based on the Northwest Indigenous Nations' philosophy of hospitality, its primary functions are to provide a gathering place for hosting cultural ceremonies, classes, conferences, performances, art exhibits and community events. The Longhouse provides the opportunity to build a bridge of understanding between the regions' tribes and visitors of all cultures. The public service mission of the Longhouse is to promote indigenous arts and cultures through education, cultural preservation, and economic development. It is also the administrative home for the Washington State Institute for Public Policy. The institute's mission is to carry out practical, non-partisan research—at legislative direction—on issues of importance to Washington State. The institute conducts research using its own policy analysts and economists, specialists from universities, and consultants. Institute staff work