3. (a) How are the contents of water categorized?

(b) When are those contents of concern to
scientists who test our drinking water?

Climate change to earth function human can't reduce climate

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.

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