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  1. Too Much of a Good Thing (1982 Video)

    Subject
    Chemistry
    Distribution
    OUT OF DISTRIBUTION, Videocassette. Standard formats. col. 25 min.

    Discusses phosphorus pollution in waterways and lakes. Gives a background to the uses, chemistry and manufacture of phosphorus products. Depicts the eutrophication that is prevalent in the Great Lakes and...

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  2. Cycles, The: Water, Carbon, Nitrogen, Phosphorus (2013)

    Subject
    Biology
    Distribution
    Sale, DVD (Region 2 PAL, 19 minutes), £49.00 (DVD), £20.00 (1 Year Digital Licence), £49.00 (3 Year Digital Licence)

    Change is a constant of life. The natural cycles that balance and regulate the Earth and its atmosphere provide the necessary conditions for sustaining a diverse range of life forms on the planet. But what...

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