Les points ci-dessous représentent toutes les molécules de l’atmosphère sèche (sans eau). Il y a 9016 points. Seuls les 4 premiers points ci-dessous, en rouge et en gras, correspondent à tout le CO2 atmosphérique (408 ppm). Coupez le premier point en 5 et vous aurez le CO2 d’origine humaine. Tous les autres points représentent le diazote (N2), l’oxygène (O2) et l’argon (Ar). Le CO2 est donc un gaz rare! Si on rajoute de la vapeur d’eau, il sera encore plus rare. Le cinquième du premier point serait-il capable de réchauffer toute la planète?
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