Seudónimo Seudónimo

21-06-2017
Biology

contestada

By how much did carbon dioxide levels increase from 1980 to 2000?
A.22 ppm
B.32 ppm
C.45 ppm
D.51 ppm

Respuesta :

Tylerftroop Tylerftroop

21-06-2017

c. 45 ppm I believe :D

Answer Link

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