Other organic waste. As a general rule, all garbage should be carried out, even left over food. That's a particularly important rule if you are camping in a heavily used area. In infrequently used areas, however, the rule can be applied less rigidly. Before leaving a campsite, get in the habit of doing one last look for litter including micro litter.
Micro litter consists of pieces of candy wrappers, bits of aluminum foil, cigarette butts, etc.
A quick litter pick-up is also a great thing to do at boat launching areas, car camping areas and trailheads. It's one of those small, random acts of kindness that you can do for the environment. Trails and Cross-country Travel Switchbacks. When going down switch backing trails, stay on the trail and resist the temptation to cut the switchback. Cutting switchbacks creates small pathways which divert rain and melting snow and eventually lead to erosion.