What are some of the worlds major river systems? Where are they located?
North America,Europe,Asia,Africa,Australia
Africa,South America,Asia,North America
What are 3 benefits of building Hydroelectric dams
Less radioactive waste,popele,factories
Less radioactive waste,less population
None
What are 2 costs of building Hydroelectric dams
Money,food
House,factories
All
Billions of dollars,enviormental costs
What is the MAIN reason for building hydorelectric dams
Pollution
Air
Hydroelectric potential or harvest electricity
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