The artificial fog used by Nazis to hide battleships had major effects on the environment.
Some of it may have had to do with the environment.
Before Henry David Thoreau lived in the Concord woods, he nearly burned them to the ground in a massive forest fire.
As the United States celebrates Arbor Day, learn about 10 trees that witnessed history and shaped world events.
From the Dust Bowl to the BP oil spill, explore some of the most notorious environmental disasters of the last century.
Scientists are studying beaches dating to the mid-Pliocene era, some 3 million years ago, in order to predict how high sea levels might rise in the future.
The concept of green living may be new, but humans have been reducing, reusing and recycling throughout history.