I would say it doesn't, come visit the marsh of central Wisconsin. The water
is literally a soup of fish, crustaceans, insects , molluscs , reptiles and
amphbians, probably forgot a few. This is with much agriculture, as in
cranberries. Don't always think that so called big business and agricuture
can't coicide with a healthy environment, or you might just be penniless
without any food to eat.
Ray
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