Article in English: In many countries and in every state in America, urinating and defecating in public is against the law. You can be charged with disorderly conduct if you are seen peeing or defecating in public places including public parks or public waterways.  In some very rare cases, urinating or defecating in public places can result in charges like indecent exposure or public lewdness, which can result in registering as a sex offender for the rest of your life.  Of course, there are circumstances when hiking or camping where you must relieve yourself even on public land. It is vitally important that you use common sense and ensure that you are in a relatively secluded area when you relieve yourself outdoors. The ethical and responsible way to enjoy the great outdoors is by leaving no trace of your presence there after you've left. Not only does this mean leaving wildlife alone and not destroying natural landmarks, it also means leaving no trace that you've relieved yourself. This means you will need to properly bury your own fecal waste. If you will be spending time outdoors camping, hiking, or picnicking, plan on the fact that you or your friends will need to relieve yourselves at some point in the outing.   You will need a small trowel or hand shovel for digging a hole to bury feces, a roll of toilet paper, and a plastic bag to cart out used toilet paper when you leave. You will also need waterless hand sanitizer.

Summary in Chinese:
了解相关法律。 不要留下痕迹。 有备而来。