To prevent killing of fish in rivers of some mining regions, where acid drainage pours into streams from mines the water is neutralised with lime, limestone or marl. This process saves many fish yearly.
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Bibliographic details
New Zealand Times, Volume LIV, Issue 12659, 20 January 1927, Page 7
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34Untitled New Zealand Times, Volume LIV, Issue 12659, 20 January 1927, Page 7
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