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cows looking at camera

Cow Power: A Climate Change Solution From Manure

By Katie Navarra

As the world heats up, farmers are figuring out what they can do to help fight climate change. A growing number are turning a greenhouse gas that comes from raising animals into a source of energy.

Teacher's Guide

* Article in Spanish Translation

Smoke stacks and earth illustration

Clearing the Air

By Jeffrey Deakin

More than 70 years ago, a deadly smog helped spur a national fight against air pollution. Today, most of us breathe cleaner air, but at least one primary pollutant is still putting the health of many at risk.

Teacher's Guide

*Available by subscription only

industry plant and globe

Capturing Carbon

By Jeff Johnson/Chemical & Engineering News

The huge amount of carbon dioxide the world has released into the atmosphere is causing the climate to change. Learn what methods scientists and others are using to remove the greenhouse gas from the air.

Five Ways to Reduce Your Carbon Footprint (PDF)

Capture Carbon Puzzle

Teacher's Guide

*Available by subscription only

avacados and limes
Getty Images

Why Avacados Are So Appealing

By Raadhia Patwary

Avocados have become so popular that entire merchandise lines have been devoted to them. How did the once obscure fruit become a common ingredient to smear on toast, blend in smoothies, and top our salads?

Teacher's Guide

*Available by subscription only

Featured Video

Youtube ID: YKDoNtlvsMU


Open for Discussion: Is Your Phone Sustainable?

Open for Discussion: Is Your Phone Sustainable?

By Michael Tinnesand

If atoms are forever, what does it mean to run out of certain elements? Do they age and wear out? If the supply of indium runs dry, would this mean the end of touchscreens?

Open for Discussion: Protecting Water from Fire
Rosario Ortiz

Chemistry in Person: Protecting Water from Fire

By XiaoZhi Lim

Fernando Rosario-Ortiz, an environmental chemist at the University of Colorado, Boulder, studies how water and soil chemistries change after a wildfire, and advises local drinking-water providers in Colorado and elsewhere on how to treat water from burned watersheds.