IB
IBO
Biology
May 2021
QP-202105-Biology-P1(TZ2)-HL · Question 16
Question (excerpt):
16. Which gases have made the most significant contributions to global warming? A. Water and carbon dioxide B. Carbon dioxide and methane C. Methane and nitrous oxide D. Carbon dioxide and ozone
16. Which gases have made the most significant contributions to global warming? A. Water and carbon dioxide B. Carbon dioxide and methane C. Methane and nitrous oxide D. Carbon dioxide and ozone
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