Join the Alaska Zoo and the “hundreds of millions of people, businesses and governments around the world to support the largest environmental event in history, earth hour.” Admission to this event is free. Donations welcome to help fund Arctic animal conservation education and capital projects like the Polar Bear Project. Bring a 100% bees wax or soy candle for a candlelit walk through the zoo. Plus there’s a presentation and animal enrichment for the Polar Bears. AlaskaZoo.org.