nyiolatkinson8p4jad1
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  • 10-05-2018
  • Geography
contestada

the concentration of carbon dioxide in Earth's atmosphere is _______ percent higher now than it was 250 years ago.

A. 10
B. 60
C. 40
D. 0.5

Respuesta :

Аноним Аноним
  • 15-05-2018
its C..please mark brainliest or at least 5 stars
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