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In many parts of the world you should be wary of drinking from a stream if you don't know the area well, but unfortunately a filter won't help: the water may ha
by Mediterraneo10 9y ago
In many parts of the world you should be wary of drinking from a stream if you don't know the area well, but unfortunately a filter won't help: the water may have been contaminated by a mine upstream, but filters can’t remove mining byproducts.