Unit 2 Saving the EarthTopic 2 Section A教案教学内容1. Master some new words and useful expressions：None, rubbish, anybody, steal, in public,punish, earth, die out,sand, cut down, behavior, prevent, preventfrom, although, cut off2. Learn the infinitive pronoun and adverb:3. Learn and sum up the words, phrases about pollution.4. Learn to talk about pollution and its harm.5. Develop the students sense of environment protection.6. Learn about some knowledge of pollution and environme
