Answer:
Cutting down of trees to construct airports and causing noise pollution
Vegetation cleared to set up power plants and contaminating the water
Explanation:
The activities done by humans have significantly harmed the environment. A huge number of trees has been already cut down by the humans for various commercial and settlement purposes.
In order to set up a power plant such as coal plant, nuclear power plant, a huge vegetation cover areas has been cleared, and after setting up of these power plants, it has released a huge amount of waste materials in the form of chemicals or gases, that are toxic and harmful to the various types of existing life forms. This waste materials then gets mix up with the nearby water bodies such as rivers, streams and lakes. And subsequently contaminates them and also affects the organisms existing in that ecosystem.
Due to this pollution, the water has become unsuitable for several purposes like drinking and bathing.
Similarly, the airports are also generally constructed at the outskirts, by cutting down the trees in a particular area, and due to this set up of airports, frequent noise pollution occurs.
