When you go camping, you are not supposed to leave any evidence that you were ever at your campsite. The saying is "leave only footprints and take only pictures." The purpose of "leave no trace" is to allow the environment to maintain stability.
• You should not litter.
• You should not destroy wildlife.
• You should not dump food residue.
• You should not take with you plants, animals or cool rocks (may be an egg).
• After you pull down your tent, you should lift the grass that the tent pressed down.