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IMSO 2005 Science Taiwan Selection Second Round — Theory I Question 13

IMSO Science · IMSO 2005 Science Taiwan Selection Second Round — Theory I

Question 13

Base your answers to questions 13 and 14 on the table below, which compares human population and carbon dioxide (CO₂) levels in the atmosphere over time.

**Human Population and Carbon Dioxide Levels**

|Year|Human population (billions)|Carbon dioxide in atmosphere (parts per million)|
|---|---|---|
|1960|2.50|317|
|1970|2.75|325|
|1980|3.00|337|
|1990|5.00|342|

How have the size of the human population and the amount of carbon dioxide (CO₂) in the atmosphere changed from 1960 to 1990?

Original source panel (all diagram labels and choices preserved):

Question illustration
  1. The human population has increased while the amount of CO2 has decreased.
  2. The human population has decreased while the amount of CO2 has increased.
  3. Both the human population and the amount of CO2 have increased.
  4. Both the human population and the amount of CO2 have decreased.