OISCA members, including former OISCA trainees, engage in reforestation, mangrove planting, coral reef rehabilitation, and deserts vegetation regeneration. Together with volunteers, they plant trees and take care of the planted trees to create forests. Protecting the trees from forest fires, illegal logging, harmful insects, etc., are a crucial task. In Fiji, they engage in coral reef rehabilitation. In arid regions in China, Mongolia, and Tajikistan, OISCA professionals strive to combat desertification.