Ways in which colleges can conserve energy are discussed. Reduction in the use of heat and light can be accomplished by taking several steps, such as reducing the amount of fresh air introduced into heating systems, turning off ventilating fans at night, cutting temperatures back during vacation periods and breaks, lowering the temperature of the hot water in the buildings, installing water flow restricters, decreasing both interior and exterior lighting, and rescheduling classes so that buildings are not heated for a few students. York College's program to conserve energy is described. (DB)