Get used to cleaner air : environmental health

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      <subfield code="a">Get used to cleaner air</subfield>
      <subfield code="b">: environmental health</subfield>
      <subfield code="c">by Bud Ward</subfield>
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      <subfield code="a">Congress passes tougher standards in sweeping amendments to clean air act. The new amendments call for more stringent standards for autos, trucks and urban buses. This article includes: non-attainment program; mobile sources, clean fuels; air toxics; permitting; enforcement; stratospheric ozone depletion; future impact</subfield>
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      <subfield code="a">Medio ambiente</subfield>
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      <subfield code="a">Contaminación atmosférica</subfield>
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      <subfield code="a">Control de la contaminación</subfield>
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      <subfield code="a">Sistemas de limpieza del aire</subfield>
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      <subfield code="a">Safety & health</subfield>
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      <subfield code="t">Safety & health</subfield>
      <subfield code="d">Chicago</subfield>
      <subfield code="g">Vol. 143, nº 2, February 1991 ; p. 36-38</subfield>
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