Question

Dams have caused a number of ecological problems. Justify the statement with 3 relevant points In Briefly pls

Answer 1

Answer:

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Explanation:

(i) Soil Erosion:

(ii) Species Extinction:

(iii) Spread of Disease:

(iv) Changes to Earth's Rotation:

(v) Sedimentation:

(vi) Siltation:

(vi) Water logging:

(viii) Salinisation:

Answer 2

Explanation:

Dams store water, provide renewable energy and prevent floods. Unfortunately, they also worsen the impact of climate change. They release greenhouse gases, destroy carbon sinks in wetlands and oceans, deprive ecosystems of nutrients, destroy habitats, increase sea levels, waste water and displace poor communities.

The flooding of surrounding habitat around dams kills trees and other plant life that then decomposes and releases large amounts of carbon into the atmosphere. Because the river is no longer flowing freely, the water becomes stagnant and the bottom of the reservoir becomes becomes depleted of oxygen.

Dams store water, provide renewable energy and prevent floods. Unfortunately, they also worsen the impact of climate change. They release greenhouse gases, destroy carbon sinks in wetlands and oceans, deprive ecosystems of nutrients, destroy habitats, increase sea levels, waste water and displace poor communities.

Disadvantages of Dams - Impact on Environment and People

Negative Impact on Aquatic animals: There are many negative effects on aquatic life. ...

Impact on the waterbody: The beneficial sediment that normally is washed down the river is blocked, which decreases the fertility of the soil downriver from the dam.

Hope this helps mate.