文档介绍：Work in groups ---list things as required : 1. Things that use energy around us or at any other places,( ie . light) of energy ( ie . coal) Warming up – I ( 3 m ) Unit 4 Global Warming Save the earth! Things that use energy around us or at any other places: In a house Sources of energy Things that use energy lights television cassette player computer fridge stove washing machine hairdryer video recorder coal oil natural gas wind(power) sun(solar energy) water(hydro-electric power) the sea ( tidal energy) uranium(nuclear energy) plant waster(biomass energy) Windmills, renewable. What? Renewable? Warming up – II ( 5 m ) What? What kind? Renewable? A coal power station , non-renewable. What? What kind? Renewable? An oil refinery( 精炼厂), non-renewable. What? What kind? Renewable? A nuclear power plant, non-renewable. What? What kind? Renewable? A hydro-electric dam, renewable.