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RT @richard35609781: THREE DGREES: Pliocene “Atmospheric concentrations of C02 ranged from 360 to 400 Parts per million (ppm) #stayinformed…
RT @richard35609781: THREE DGREES: Pliocene “Atmospheric concentrations of C02 ranged from 360 to 400 Parts per million (ppm) #stayinformed…
THREE DGREES: Pliocene “Atmospheric concentrations of C02 ranged from 360 to 400 Parts per million (ppm) #stayinformedcc https://t.co/kLg7UwXC7j https://t.co/6tbNnwwqvJ