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 Tylerftroop
  • 21-06-2017
c. 45 ppm I believe :D
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