Fifth-graders from Westview Elementary School in Goose Creek plant a tree during the Earth Day celebration on base Wednesday. More than 700 students came to the base's 12th Earth Day celebration. (U.S. Air Force photo/Senior Airman Nicholas Pilch)

Fifth-graders from Hunley Park Elementary School in North Charleston play inside of a parachute during the Earth Day celebration on base Wednesday. (U.S. Air Force photo/Senior Airman Nicholas Pilch)

Fifth-graders from Goodwin Elementary School in North Charleston, S.C., react to a bird saying "I love you" during the Earth Day celebration on base Wednesday. (U.S. Air Force photo/Senior Airman Nicholas Pilch)

Fifth-graders from Goodwin Elementary School learn about reptiles and their behavior from Kelly Smith, the curator at Cypress Garden in Monks Corner during the Earth Day celebration on base Wednesday. (U.S. Air Force photo/Senior Airman Nicholas Pilch)

Lamar Sterling, fifth-grader from Midland Park Elementary School, puts on the fire protection uniform with help from Airmen from the 437th Civil Engineer Squadron fire department during the Earth Day celebration on base Wednesday. (U.S. Air Force photo/Senior Airman Nicholas Pilch)

A young girl looks at the Charleston AFB Honor Guard as they pass the crowd during the Earth Day celebration on base Wednesday. (U.S. Air Force photo/Senior Airman Nicholas Pilch)