Which of the following will upset the cycle by adding too much of carbon dioxide?
A. Large scale felling of trees
B. Increase in human population
C. Overgrowth of fungi
D. Over-use of fossil fuels
Answer:D
Which of the following will upset the cycle by adding too much of carbon dioxide?
A. Large scale felling of trees B. Increase in human population C. Overgrowth of fungi D. Over-use of fossil fuels