Unit 1 If everyone starts to do something, the world will be saved..pptpage1Module 12Save our worldpage2UNIT 1If everyone starts to do something, the world will be saved.page3We can see a very dirty river. There is lots of rubbish. The fish has been dead because of the water pollution. What can you see?page4What can you see?We can see that rubbish is being burnt. The smoke goes into the air. It is causing air pollution. page5What can you see?We can see s..