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The chemical website Compound Interest, is producing a series of infograms to communicate some chemistry. Here is an excellent one they produced on fluoride. I think it would make a great poster.
It is accompanied by some straightforward text describing the science behind fluoridation and countering a lot of the misinformation anti-fluoride propagandists promote.
Worth reading. See Fluoride & Water Fluoridation – An Undeserved Reputation?
The chemically minded may also be interested is some of their other infograms – here are just a few examples:
The Chemical Compounds Behind the Scent of the Sea
The Chemistry of Insect Repellents
What Gives Beer its Bitterness …