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  • Transcriber: TED Translators Admin Reviewer: Rhonda Jacobs

  • Why is the world warming up?

  • Let's think of Earth for just a moment as a greenhouse.

  • Every second, a huge amount of energy smashes into our greenhouse.

  • Our atmosphere, the glass roof and walls,

  • reflects some of that energy,

  • but most of it passes right through and heats everything up.

  • Much of that heat used to escape back into space,

  • keeping us at a stable, warm temperature.

  • But then something changed.

  • Humans began to spew enough carbon dioxide to fill billions of greenhouses each day.

  • What does all that greenhouse gas do?

  • It makes the glass of our greenhouse thicker.

  • Thicker glass means heat escapes into space much more slowly.

  • And don't forget, energy from the sun

  • is still streaming in just as quickly as before.

  • The result is a planet with temperatures too hot for our liking

  • and, eventually...

  • living.

  • [Countdown

  • Take action on climate change at Countdown.ted.com]

Transcriber: TED Translators Admin Reviewer: Rhonda Jacobs

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B1 greenhouse thicker countdown energy warming heat

Why is the world warming up? | Kristen Bell + Giant Ant

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    林宜悉 posted on 2020/10/30
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