nyiolatkinson8p4jad1 nyiolatkinson8p4jad1

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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