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Transcriber: TED Translators Admin
Reviewer: Rhonda Jacobs
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Translator: Andrea aaa
Reviewer: Andrea Sala
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Why is the world warming up?
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Per qué el món s'està escalfant?
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Let's think of Earth
for just a moment as a greenhouse.
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Per un moment, pensem en la Terra
com si fos un hivernacle.
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Every second, a huge amount of energy
smashes into our greenhouse.
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Cada segon, una gran quantitat d'energia
impacta contra el nostre hivernacle.
00:16
Our atmosphere, the glass roof and walls,
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L'atmosfera, les parets
i el sostre de vidre,
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reflects some of that energy,
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reflecteixen part d'aquesta energia,
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but most of it passes right through
and heats everything up.
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però la majoria travessa
i ho escalfa tot.
00:27
Much of that heat
used to escape back into space,
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Molta d'aquesta calor
solia escapar novament a l'espai
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keeping us at a stable, warm temperature.
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mantenint-nos en una temperatura
acollidora i estable.
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But then something changed.
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Però llavors quelcom va canviar.
00:36
Humans began to spew enough carbon dioxide
to fill billions of greenhouses each day.
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Els humans van llençar suficient diòxid de
carboni per omplir bilions d'hivernacles.
00:42
What does all that greenhouse gas do?
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Què fa tot aquest gas d'efecte hivernacle?
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It makes the glass
of our greenhouse thicker.
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Fa que el vidre del nostre hivernacle
sigui més gruixut.
00:48
Thicker glass means heat escapes
into space much more slowly.
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Un vidre més gruixut vol dir que
la calor escapa més lentament a l'espai.
00:52
And don't forget, energy from the sun
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I cal no oblidar que l'energia del sol
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is still streaming in
just as quickly as before.
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segueix fluint
tan ràpidament com abans.
00:57
The result is a planet with temperatures
too hot for our liking
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El resultat és un planeta amb
temperatures massa altes pel nostre gust
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and, eventually...
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i, amb el temps...
01:03
living.
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per a viure-hi.
01:08
[Countdown
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[Countdown
01:10
Take action on climate change
at Countdown.ted.com]
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Pren mesures contra el canvi
climàtic a Countdown.ted.com]
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