Unit 2 Saving the Earth Topic 3 Would you like to be a greener person? Section C Teaching aims and demands 1.Learn new words: power, acid, nuclear, technology, electric, maglev, per, wheel, guide, steel, movement. 2. Go on learning some compound sentences: (1) In many countries, people produce power from coal, but it is very dirty and causes acid rain. (2) Although electric vehicles produce no pollution, there will be an increase in electricity needs if they are widely used. 3. Learn the advanta
