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  1. 1

    Environment, energy, and economy Strategies for sustainability

    Опубликовано 1997
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    Environment, energy, and economy Strategies for sustainability
  2. 2

    State of the Environment the state of the world environment по United Nations Environmental Program

    Опубликовано 1987
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    State of the Environment the state of the world environment
  3. 3

    The world environment 1972-1982 a report by the United Nations Environment Programme

    Опубликовано 1982
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    The world environment 1972-1982 a report by the United Nations Environment Programme

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