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Pond Dipping
Автор: Scot .Environment
Загружено: 2015-09-04
Просмотров: 5693
Описание:
Fresh water bodies, like this pond here, can sometimes be susceptible to pollution. There are many indicators of pollution for fresh water, but today we're going to look at the invertebrates, some of which are sensitive to pollution, and some of which are not so sensitive.
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