The Environmental Stewardship is essential to success in the cruise line industry. The program provides support for the environment through leadership, investment, and collaborations. The cruise lines use energy-efficient engines, hull coatings, energy-saving LED lights, and etc. Their plan is to reduce the amount of energy consumed by ships and save the Earth. Cruise lines are leaders in developing, promoting, and implementing policies and best practices that exceed international regulations. The cruise industry recycles and reuses lots of waste, working to reduce the carbon footprints left from the ships.