9
QuizMultiple Choice
The Importance of Carbon
Question 9 • HLSS Biology A
The table below shows the level of carbon dioxide in the atmosphere for a period of 50 years.Carbon Dioxide LevelWhat conclusion can you make about how the carbon dioxide level has changed over time?
Answer
A
The level has not changed.B
The level of CO2 has declined.C
The level of CO2 has risen.D
The level has reached its maximum.