人教版选修6-Unit-4-Global-warming-warming-up课件.ppt

1、RevisionWhat are the Energy resources and are they renewable or non-renewable?Windmills,renewable.A coal power station,non-renewable.An oil refinery(精炼厂精炼厂),non-renewable.A nuclear power plant,non-renewable.Solar panels,renewable.A hydro-electric dam,renewable.Non-renewable Renewable Coal Oil Natura

2、l gas Uranium Wind(wind power)Sun(solar energy)Water(hydro-electric power)Plant waste(biomass energy)Hot springs or geysers(geothermal energy)The sea(tidal energy)Fossil fuelsWhat are fossil fuels?Ancient animal and plant material below the surface of the earth with a high carbon content,such as coa

3、l,oil and natural gas,which can be burnt to produce energy.Also known as non-renewable energy because once they are used they have gone forever;they cannot be renewed.What is the greenhouse made and used for?How does it work?The air inside is warm because the glass traps the heat from the sun and ke

4、eps it from escaping.This makes the greenhouse heat up and so the plants can grow throughout the cold period.What are the“greenhouse gases”?In the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”,including carbon dioxide,methane(甲烷甲烷,沼气沼气)and water vapor.What do you think greenhousegases do?They trap heat from the sun and therefore warm the earth.