Building them has considerable environmental impact - it creates a man-made lake that floods great areas. Migrating fish are stopped in their tracks.
Places near large dams.
One of the disadvantages of using water or hydroelectric power is that is gives off a good deal of carbon dioxide as well as methane. Other disadvantages of hydro power are the cost to install the dams and turbines, and the fact that they destroy the habitat around the installations.
They can harm fragile ecosystems
2 hydroelectric dams in south Africa
believe it or not hydroelectric dams do affect the environment.
Singapore does not use hydroelectric dams to generate electricity.
Yes. If we can use more electricity from dams (hydroelectic power), we conserve fossil fuels. I also note that while hydroelectric is generally better than using fossil fuels, there are a number of disadvantages to hydroelectric power, including loss of land and negative impact on the environment when large dams are constructed. See related links.
hydroelectric dams
yes
Dams are built for a number of reasons, two being:To control the flow of water so as to eliminate floodingTo make electricity using hydroelectric power
Hydroelectric power
Hydroelectric dams.