Pack It In, Pack It Out.This common saying is a simple yet effective way to get backcountry visitors to take their trash home with them.
Pack It In, Pack It Out.This common saying is a simple yet effective way to get backcountry visitors to take their trash home with them.
带来，带走：一个朴素的俗谚很有效地让来野外的每个人随身带走他们的垃圾。