Which of the following is not a way humans have impacted the tundra?

a. oil drilling

b. logging

c. overgrazing

d. mining

Overgrazing. Oil drilling and mining are the major causes of pollution of the tundra. Human activities like logging and the results of human activities affected the plant life in the biome. They prevented the plant life to grow on some areas of the tundra.

The answer to this question is:

B. Logging