energyKnow Your World
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What is "global climate change"?
Earth is warming fast. But why?
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What is the greenhouse effect?
How is Earth like a gardener's greenhouse?
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What is the big deal with carbon?
We are returning carbon to the air much faster than nature took it out!
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How do we know the climate is changing?
The clues are everywhere!
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What is happening in the ocean?
Our world is a water world, and the ocean is in charge.
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What else do we need to find out?
And how is NASA seeking the answers?
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What can we do to help?
We can do a lot, including planning for a green career.
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Planet Health Report: AIR
Why is carbon dioxide level a "vital sign"?
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Planet Health Report: TEMPERATURE
Why is temperature a "vital sign"?
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Planet Health Report: SEA LEVEL
Why is sea level an Earth "vital sign"?
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Planet Health Report: SEA ICE
Why is sea ice an Earth "vital sign"?
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Plant a butterfly garden!
Native plants nurture these awesome creatures.
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Play Leaps and Flutters!
Find out why we worry about butterflies and frogs.
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The Climate Time Machine
Travel back and forward in time and see the effects of climate change.
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Which pole is colder?
The North and South Poles are polar opposites in more ways than one!
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Earthy Word Games
See a living world in a glass bubble! Find hidden words about Earth.
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Cloud Picture Scrambles
Unscramble cloud pictures and learn "CloudSpeak."
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Migration Concentration
Test your memory on these endangered animals.
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Missions to Planet Earth
Beat the computer at completing three missions to explore Earth from space.
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Whirlwind Disaster
Rescue letters before they get sucked into the eye of the hurricane!
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