Final answer:
Human impact on rivers through pollution, damming, and hydropower projects has significant environmental consequences.
Explanation:
Human activities have significantly impacted rivers, leading to pollution, damming, and destruction of aquatic environments. Dam construction, especially for hydroelectricity, alters river conditions and affects biodiversity. For example, damming can lead to increased severe flooding downstream. Additionally, small run-of-the-river projects are seen as more environmentally friendly alternatives to large-scale dam hydropower projects.
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