The author and activist Bill McKibben says 350 is the most important number in the world. The amount of CO2 in the atmosphere has to fall to 350 parts per million to avoid 'huge and irreversible damage'. It currently stands at 387 ppm.
'What we need most right now are on-the-ground examples for how to take the number 350 and drive it home: in art, in music, in political demonstrations, in any other way you can imagine.'
Longest known comet tail stretched for over a billion kilometres
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NASA's Cassini spacecraft crossed paths with the elongated tail of a comet
in 2002, picking up hydrogen ions from over a billion kilometres away
50 minutes ago
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