UNIT 1

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1.Some scientists and city planners aim to reuse the energy generated by wastewater that runs underground in Paris.i@@j
2.Thanks to the introduction of the sewer system into the energy policy, we donft have to worry about air pollution anymore.i@@j
3.The heating system using sewage will be successful except its bad smell.i@@j
4.The energy generation method utilizing sewers hasnft been put to practical use yet.i@@j
5.Sewers can be used for some other purposes besides heating.i@@j
