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2 ChemClub Infographic Contest Winner
Petrichor: The Smell of Rain
4 Open for Discussion: Can We Make Cars that Are Clean,
Fuel-Efficient, and Powerful?
By John Uhlrich
Car manufacturers are working hard to make cars that emit less
pollution, consume little gasoline, and have powerful engines. Is that
19 As a Matter of Fact
Undeserved Reputation? Fluoride & Water Fluoridation
5 The Drive for Cleaner Emissions
By John Uhlrich
The Volkswagen scandal serves as a sobering reminder that reducing
car emissions is not easy to achieve. Why is that so?
8 No-Hit Wonder! D3O®
By Brian Rohrig
D3O® is a bright-orange material that protects more than 100 products—including cell-phone cases, kneepads, and helmets—from
11 Iron in the Diet: Power on Your Plate?
By Gail Kay Haines
We all need a small amount of iron in our food every day, but too little
or too much can cause serious health conditions. It’s all part of the
body’s iron balancing act.
14 Brush Up on Toothpaste!
By Valerie Brown
How does toothpaste prevent tooth decay and keep your teeth clean?
We look at the main ingredients and explain how they work.
16 62 Endangered Elements
By Chris Patrick
The natural reserves of 62 chemical elements are running low. We
look at how three of them—indium, helium, and phosphorus—are
used in everyday products and what would happen if we ran out of
No-Hit Wonder! D3O,® p. 8
Vol. 35, No. 1 February/March 2017
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ON THE COVER: IS TOCK; SHUT TERSTOCK
Brush Up on
Toothpaste! p. 14
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