Would we still be able to breathe? Could our atmosphere ever come back?
Just how important is the atmosphere to our planet? It's absolutely vital. It protects us from asteroids and solar radiation. It regulates our climate. It makes life on Earth possible!
Our nearest neighbor, Mars, lost most of its atmosphere some 4 billion years ago, and look what's become of it... Once warm and wet, it ain't the planet it used to be.
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