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Old 06-15-2015, 11:00 AM
Join Date: May 2003
Location: Florida
Posts: 67,343
Originally Posted by ralph124c View Post
Since hippos defecate in the same waters that they live in, they must have good immune systems. It would be like humans living in a sewer.
Everything else living in a river defecates in it, too. Human body wastes cause disease because we form such dense populations. If a hunter-gatherer human population was shitting in a river it wouldn't be a big deal to the people downstream because it would be a tiny, tiny fraction of the volume of water. By contrast, there are 500 million people living in the Ganges river basin.
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