<http://schema.org/description>
"Tread Lightly! was introduced by the U.S. Forestry Service as a result of the growing popularity of outdoor recreation. It is a non-profit advocate for outdoor recreational education and sustainable land management. Take this quiz to understand how it works."^^<http://www.w3.org/2001/XMLSchema#string>
<http://adventure.howstuffworks.com/outdoor-activities/clubs-networks/tread-lightly-quiz8.htm>