What are possible negative effects of building a hydropower dam? Select the two correct answers.

1. decreased sanitation in the city

2. displacement of people living near the proposed dam

3. lower river water levels in other areas

4. decreased economic activity

5. increased water prices

Decreased sanitation in the city / Displacement of people living near the proposed dam

2. displacement of people living near the proposed dam

3. lower river water levels in other areas

Explanation:

A hydroelectric dam aims to dam and store water, the raw material for the production of hydroelectric energy. It is also the function of the dam to obtain the necessary gap to rotate the turbines of the generating units.

The hydroelectric dam can bring numerous benefits to society, however not everything is perfect when it comes to the use of hydroelectric energy, as there are also several problems related to this resource, among which we can mention: the displacement of people who live near the proposed dam, lower levels of river water in other areas, deforestation, loss of ecosystem balance, among others.