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人教2003课标版《Warming up、Pre-reading、Reading、Comprehending》PPT课件优质课下载
water (hydro-electric power)
the sea ( tidal energy)
uranium 铀 (nuclear energy)
plant waste工厂废物
(biomass energy生物质能源)
energy sources
coal
oil
natural gas
uranium
wind (wind power)
sun (solar energy)
water (hydro-electric power)
plant waste (biomass energy)
hot springs or geysers 间歇泉(geothermal energy地热能源)
the sea (tidal energy)
fossil fuels矿物燃料
non-renewable
renewable
run out ?
never run out?
What are fossil fuels?
Ancient animal and plant material below the surface of the earth with a high carbon content碳含量, which can be burnt to produce energy.
They are non-renewable energy.
Once they are used they have gone forever; they cannot be renewed.