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      <marc:subfield code="a">Canadian environmental sustainability indicators : </marc:subfield>
      <marc:subfield code="b">phosphorus loading to Lake Erie.</marc:subfield>
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      <marc:subfield code="a">Phosphorus loading to Lake Erie</marc:subfield>
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      <marc:subfield code="a">Gatineau QC : </marc:subfield>
      <marc:subfield code="b">Environment and Climate Change Canada = Environnement et changement climatique Canada, </marc:subfield>
      <marc:subfield code="c">December 2021.</marc:subfield>
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      <marc:subfield code="c">©2021</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Indicateurs canadiens de durabilité de l'environnement : charge en phosphore dans le lac Érié.</marc:subfield>
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      <marc:subfield code="a">"Project code: EC21032."</marc:subfield>
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      <marc:subfield code="a">Issued also in HTML format.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references.</marc:subfield>
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      <marc:subfield code="a">"Phosphorus is an essential plant nutrient. However, when phosphorus levels are too high, they can have harmful impacts on the health of a lake. High phosphorus levels in Lake Erie are leading to degraded water quality, algal blooms and zones of low oxygen which harm aquatic life. These indicators report on the amount of phosphorus reaching Lake Erie, known as phosphorus loading"--Page 5.</marc:subfield>
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      <marc:subfield code="a">Phosphorus</marc:subfield>
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      <marc:subfield code="z">Erie, Lake.</marc:subfield>
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      <marc:subfield code="a">Water</marc:subfield>
      <marc:subfield code="x">Phosphorus content</marc:subfield>
      <marc:subfield code="z">Erie, Lake.</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Environment and Climate Change Canada, </marc:subfield>
      <marc:subfield code="e">issuing body.</marc:subfield>
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      <marc:subfield code="t">Indicateurs canadiens de durabilité de l'environnement : </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.904008</marc:subfield>
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      <marc:subfield code="t">Canadian environmental sustainability indicators : </marc:subfield>
      <marc:subfield code="b">2023</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.929436</marc:subfield>
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      <marc:subfield code="t">Canadian environmental sustainability indicators : </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.888488</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2022/eccc/en4-144/En4-144-92-2021-eng.pdf</marc:subfield>
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      <marc:subfield code="u">https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/phosphorus-loading-lake-erie.html</marc:subfield>
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