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Cirrus clouds are made of ice particles and can cover 30% of Earth's atmosphere.

Cutting Costs by Cleaning Air (Op-Ed)

By Dan Lashof last updated

Can cutting carbon cut costs?

Energy
view of Earth and cloud cover

Keystone XL Pipeline Will Cause Damage Beyond Spills (Op-Ed)

By Danielle Droitsch last updated

Does the Keystone XL pipeline have environmental impacts beyond the risk of spills?

Fossil Fuels
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Cells Get Stressed, Too

By Amanda Chan last updated

Environmental stressors can turn on cells' genes when they're supposed to be off.

Wellbeing
A satellite image of Lake Shala (blue), Lake Abijatta (green) and Lake Langano (yellow) captured by the Landsat 8 satellite on March 29.

Trio of yellow, blue and green lakes in Ethiopia stuns in striking satellite image

By Harry Baker published

All three lakes used to be part of the same ancient body of water.

Rivers & Oceans
Genghis Khan

Wet Climate May Have Fueled Mongol Invasion

By Stephanie Pappas last updated

Abundant grasslands could have fueled Genghis Khan's armies.

Weather
Biology is the study of all living organisms, including this adorable jewel bug and the plant it's perched on.

What is biology?

By Alane Lim, Scott Dutfield published

Reference Broadly speaking, biology is the study of life.

Reference
The meaning of colors

The meaning of colors: How 8 colors became symbolic

By Natalie Wolchover, Scott Dutfield published

Reference How can red mean love AND war? Why is purple royal? Life's Little Mysteries answers these questions and more.

Reference
Greenhouse gases are being emitted into the atmosphere with dire consequences. Here, a factory emits a harmful gas.

Greenhouse gases: Causes, sources and environmental effects

By Tiffany Means, Marc Lallanilla published

Greenhouse gases are atmospheric gases that absorb infrared radiation and trap heat in the atmosphere. Increases in emissions of these gases are leading to climate change and global warming.

Climate Change
The Sahara Desert is seen here, in Northern Africa.

Could the Sahara ever be green again?

By Donavyn Coffey published

The Sahara was once a grass and shrub-covered steppe. Could this ever happen again?

Planet Earth
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Best Recycling Bins

By Nikki Johnston published

Go green by recycling glass, metal, paper, and plastic. These bins will hold your recyclables until collection day.

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