Rotary clubs often work with their partners in service to protect natural resources. Rotaract and Interact , Rotary-sponsored service clubs for young people, organize environmental projects that involve their peers. Many Rotary Foundation Ambassadorial Scholars have undertaken important ecological studies while studying abroad. The special designation "Preserve Planet Earth Scholar" encourages Rotary Foundation Scholars to study ecological issues. Since 1991 there have been over 100 PPE Scholars.