1. 2. 3. 4. 5.
PART B: VOCABULARY
I.Fill the blank with the right word from the list. There are more words than needed.(5pt)
protect produce environmentally alternatives
power consumption abundant limited
Coal, oil, and natural gas supply modern civilization with most of its power. However, not only are
supplies of these fuels (1)____________, but they are a major source of pollution. If the energy demands
of the future are to be met without seriously harming the environment, existing alternative energy
sources must be improved or further explored and developed. These include nuclear, water, solar, wind,
and geothermal power, as well as energy from new, nonpolluting types of fuels. Each of these
(2)____________, however, has advantages and disadvantages.
Nuclear power plants efficiently (3)____________ large amounts of electricity without polluting the
atmosphere; however, they are costly to build and maintain, and they pose the daunt ing problem of what
to do with nuclear wastes. Hydroelectric power is inexpensive and (4) ________________ safe, but
impractical for communities located far from moving water. Harnessing energy from tides and waves has
similar drawbacks. Solar (5) ____________ holds great promise for the future but methods of collecting
and – concentrating sunlight are as yet inefficient, as are methods of harnessing wind power.
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