Read the passage and complete the following sentences with ONE or TWO words. 

The increased loss of the ecosystems including wetlands, wildlife, rainforests, coral reefs, aquatic life forms, and grasslands are highly influenced by overpopulation. It is out of overpopulation that activities such as excessive agriculture, environmental pollution, and extensive land development have become more and more intensive.

For example, rainforests originally covered 14% of the entire earth’s surface. Today, rainforests only cover about 6% of the earth’s surface and scientists forecast it may even become less in the next four decades judged by the current rate of vegetation removal, logging, and deforestation. Besides, due to environmental pollution, 30% of the ocean reefs have been lost because of acidification and global warming since 1980. Also, more than half of the original wetlands have been lost.

Question 21.
The increased loss of the_________  are highly influenced by overpopulation.
Question 22.
Excessive agriculture has become more and more ______  .
Question 23.
___________   of the entire earth’s surface was originally covered by rainforests.
Question 24.
Rainforests may cover less than 6% of the earth’s surface in the next_________   .
Question 25.
Acidification and _______ have made 30% of the ocean reefs disappear since 1980.