Katie Ramirez, left, energy installation manager at Joint Base Pearl Harbor-Hickam, speaks to patrons on water saving methods at the Pearl Harbor Navy Exchange Earth Day Expo: Partnering for a Greener Future on Joint Base Pearl Harbor-Hickam. Earth Day serves as a reminder of the importance of environmental protection and community engagement and has been celebrated nationally since 1970. (U.S. Navy photo by Mass Communication Specialist 3rd Class Johans Chavarro/Released)