Underground, where else?
(not strip mining)
no
Solar energy, geothermal energy, wind, petroleum, coal, uranium (nuclear fuel).
Coal! obviously its coal.
coal
fossil fuel and shamrocks
Oil and coal
coal and oil i think
the earth's natural resources are oil,air,coal, wood, fossil fuel,and water
sand coal
copper cotton and coal
Coal.
The fuel that India uses most to generate electricity is coal. Second to coal is hydro power and then natural gas resources.