Student Conservation Association
"The Student Conservation Association (SCA) provides high school students, college students and others with meaningful conservation service internships and volunteer opportunities in our National Parks, Forests and other public lands.
"SCA is the largest and oldest conservation service organization in America. SCA interns and volunteers provide more than one million hours of natural resource conservation service annually at nearly 400 sites throughout the US." [from website]
Children and Youth, Organizations (NGO), Volunteers