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Letter "E" » ecological
«Those who admire the massive, rigid bone structures of dinosaurs should remember that jellyfish still enjoy their very secure ecological niche»
«The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.»
«In its broadest ecological context, economic development is the development of more intensive ways of exploiting the natural environment.»
«Modern Society will find no solution to the ecological problem unless it takes a serious look at its lifestyles.»

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