Participants for the annual Earth Day Fun Bike Ride cool off after arriving at Felix Field aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 13, 2017. Natural Resources and Environmental Affairs hosts the event annually to raise environmental awareness of Combat Center residents and the local community in the weeks leading up to Earth Day. (U.S. Marine Corps photo by Lance Cpl. Natalia Cuevas) - Participants for the annual Earth Day Fun Bike Ride cool off after arriving at Felix Field aboard Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 13, 2017. Natural Resources and Environmental Affairs hosts the event annually to raise environmental awareness of Combat Center residents and the local community in the weeks leading up to Earth Day. (U.S. Marine Corps photo by Lance Cpl. Natalia Cuevas)
Cyclists complete a 50-mile ride during the Park-to-Park Bike Ride through Joshua Tree National Park, Calif., April 30, 2016. The event was hosted as a joint effort between the Combat Center, the City of Twentynine Palms and the Joshua Tree National Park Service to celebrate Earth Day as well as the 100-year anniversary of the park. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released) - Cyclists complete a 50-mile ride during the Park-to-Park Bike Ride through Joshua Tree National Park, Calif., April 30, 2016. The event was hosted as a joint effort between the Combat Center, the City of Twentynine Palms and the Joshua Tree National Park Service to celebrate Earth Day as well as the 100-year anniversary of the park. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released)