DEPARTMENTS

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 possible?

19 As a Matter of Fact

Undeserved Reputation? Fluoride & Water Fluoridation

FEATURES

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 impact.

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 them.