We welcome teenagers between the ages of 16-18 to join our Cleaning and Greening program.

Program Highlights

Designed especially for teens, the Cleaning and Greening (C+G) program offers a summer of service in our nation’s most beautiful and iconic landscapes.

In addition to learning about the natural forces that have shaped the biodiversity of our national parks, C+G students stay overnight in park facilities and work alongside rangers to improve wildlife habitat and clean up public access points like trailheads and campgrounds.

Clean Water


The Cleaning and Greening program is available at 6 national parks across the country. Each summer session runs from June to August, starting with program-wide rally and training in Jackson, Wyoming. See our contact information below to learn more and register today.

Contact Us

If you’re interested in learning more about our Cleaning and Greening program or would like to sign up for a session near you, call Dane Director at (555) 555-5555 or email him at dane@natureknowledge.org.