Leave no trace : minimum impact outdoor recreation : the official manual of American Hiking Society

As Americans continue to recreate in record numbers, learning leave-no-trace principles becomes increasingly important. First developed by the USDA Forest Service, these techniques are now being adopted by outdoor organizations across the country. Ranging form common-sense practices to more serious ethical considerations, these no-trace techniques help protect out fragile resources for generations to come.

official Manual Of The American Hiking Society On The Ethics And Commonsense Practices Of Backcountry Human Impact.