Contrary to popular belief, there are numerous ecological and biological consequences to the widespread construction of large dams, namely with regards to the health and sustainability of nearby rivers and wildlife.

Most dams are built to regulate water flow, improve navigation, and produce hydroelectric power, but these manmade structures tend to bring about some serious issues as well, the most prevalent of which are shown below:
  • Restricts fish migrations
  • Impedes the natural flow of vital sediments to downstream locales
  • Alters the chemical composition of adjoining watercourses
  • Erodes coastal deltas

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