WEBVTT

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Intro music.

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It's everywhere you go, every day, and your health depends on it. It's the air you breathe,

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and we dramatically affect it, through simple things like driving to work.

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We have a responsibility to protect the atmosphere and keep it healthy, and that's where Aura comes in.

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Aura will study the chemistry of the atmosphere: that is, what kind of molecules we find there,

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how many there are, and how humans' activities affect those levels.

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Pollution from one part of the planet can cause dramatic changes to places thousands of miles away,

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so getting a comprehensive picture is important.

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And it's not just man made emissions that affect our lives: volcanic eruptions and solar events can have far reaching effects on climate and air quality.

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Aura is about better understanding our planet. Its launch will be the culmination of a 15 year international effort

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to establish the world's most advanced earth observing system.

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