Name some important hydel power stations in India.
Bhakra Nangal, Gandhi Sagar, Nagaijunasagar, and Damodar Valley Projects are important hydel power stations in India.
Write the advantages and dis¬advantages of non-conventional sources of energy.
Name and describe some non- conventional sources of energy.
How is hydroelectricity, produced?
Write common uses of minerals.
Describe the mineral distribution in North America.