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

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.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.