Unit 12 The earth 课件

课件20张PPT。Unit 12 The Earth oceanoceanrubbishlandforestforestforestearth sickIn the past, the earth was very clean and beautiful.But now, some parts are dirty. Can we do anything to help the Earth?Look and sayCan we do anything to help the Earth?We should stop cutting down so many trees.should or should stop?We should stop using plastic bags and bottles.We should stop throwing rubbish into rivers.We should stop killing wild animals.We should write on both sides of paper.We should walk or ride a bike more often.We should plant more trees.Homework想一想我们还能为保护地球做些什么？Thank you!