Bike to work, car pool, use mass transit, or walk.
Encourage your company to sign up for the Green Lights and Energy Star energy-saving programs offered by the U.S. Environmental Protection Agency. Contact EPA at 888.STAR.YES (888.782.7937).
Assemble a team of co-workers to conduct an energy audit at your workplace. Look for lights and equipment needlessly left on, drafty windows and doors you could insulate, ineffici ent thermostat settings, and other energy-wasters. Make recommendations for improvements that will save energy and money.
Put up an Earth Day bulletin board during April that offers employees new energy-saving tips each week.