乱丢乱扔的行为在很多野外地区比10到20年前好了很多，但乱丢乱扔仍然是一个问题。
The litter situation in many backcountry areas is better than it was 10-20 years ago; however, litter continues to be a problem.
不乱扔纸屑，不乱丢果壳和包装袋。
我最看不惯的就是陈芳乱丢垃圾的毛病——随地乱扔垃圾。
For me, one of the most annoying things about Chen Fang was her habit of littering - throwing rubbish away anywhere.
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