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350ppm
350ppm is the safe level of carbon dioxide in our atmosphere. We've reached 400pm...and it's rising.
Gemma Evans
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16 photos
FORREST CAVALE
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Ivars Krutainis
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NASA
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Yi Chun Chen
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Petter Rudwall
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Rodion Kutsaev
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Louis Moncouyoux
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Ales Krivec
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Sebastian Pichler
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Chelsea Bock
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Thomas Richter
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Matt Benson
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Gor Davtyan
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Jasper van der Meij
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Dikaseva
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Brad Helmink
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