“... the materials that compose this waste and explains their effects on environmental elements soil, water and air...”
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“... of the Corporation is composed of the members, the same who are elected by voting in general meeting; high weakness...”
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“... the variables under investigation, taking into account the total sample that was composed by the owners of 9...”
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“... instruments to obtain data were composed by surveys of teachers, parents and students in the fifth, sixth...”
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