and help people get to kown that the natural wordld is our o

帮助人们认识到：自然世界world是我们唯一的家园,所以我们必须保护她.
再问： help keep the environment in good shape by picking up rubbish or planting a tree in your school or in your neighborhood.这个捏
再答： 你又不给悬赏分。通过在学校或者你的街道捡垃圾、或者种植树木，使环境保持在一个好的形态。