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Eleveated trains loop through downtown Chicago, providing easy access to a dense and vibrant urban center.
On a warm, sunny day in July, I took a ride to the top of the Sears Tower in Chicago. By coincidence, it happened to be just a few days after the city's most distinctive landmark was officially renamed.

Features

On a cool evening in early September, thunder rumbles across the wide-open badlands and prairies of southwestern South Dakota.
Once upon a time, our oceans teemed with life. But when exactly was that time?
Ships have been described as floating islands or mobile marine ecosystems. Along with cargo, they can transport animals from one part of the world to another.
When Los Angeles chose to open a new transit line in the Valley, it didn't build a train or a trolley or a subway. It added a busway, the Orange Line, and people here love it.
Why Cities Need Trees Decoding Smugglers Q & A: A More Perfect Union Rx: Flat Screen TV CSI: Planet Earth
Today a friend drove me to the World Center for Birds of Prey outside Boise without telling me why.
Eaarth
Five years ago David Owen set out to show that, despite outward appearances, New York City is actually "the greenest community in the United States."
Spotlight: Plundering Appalachia The Curse of the Labrador Duck The Big Burn
It's harvest time in California's Napa Valley, and the rows of vines that line the meandering Silverado Trail are laden with fat, lush clusters of grapes.
I never thought I would write a book. But as the debate about clean energy and climate legislation heated up during the past few months, I wanted to reach out to the broader public.
FIELDWORK: Keeping It Real NRDC in the News
One morning in September, rifle-bearing hunters set out across the Idaho wilderness in pursuit of prey.
Fighting For What's Right A Safer Ride Toxic Screen Between the Lines: The ABCs of Protecting Our Waterways