Because solar energy runs the water cycle, giving rise to precipitation, and then the rain water flows into the reservoirs of dams.
solar energy
Hydroelectric power and solar energy.
Water (hydroelectric power).
Wind power, hydroelectric power (water power), and solar power.
wind, solar, nuclear power, hydroelectric
Renewable energy can be created by solar, wind, tides, and hydroelectric power.
Wind power, solar panels, hydroelectric, etc.
solar power , wind power , nuclear power , hydroelectric , tidal power , biomass energy .
Wind, solar, and hydroelectric power. All kinds of renewable energy.
The five sources of energy are solar, nuclear, wind, hydroelectric and fossil fuels. Nowadays there are five energy sources: fossil fuels, nuclear, wind, hydroelectric amd solar. The alternative sources are solar, wind and hydroelectric.
There are many great energy sources other than wind turbines. There is hydroelectric power and solar power.
Direct solar power generation is when sunlight is used to heat something or to generate electricity directly (e.g. using a solar panel)Once you understand the above you will see that hydroelectric power is obtained when water from a high elevation moves through a turbine to a lower elevation - the energy used is gravity (potential and kinetic energy). However if you think about it what gets the water up in the high river or lake in the first place - the energy that does this is the heat form the sun evaporating the water which forms into cloud then comes down as rain. Therefore although the hydro electrical energy is gravity driven we are in fact using the energy that came form the sun (that raised the water) with hydroelectric power but this energy comes to us in an indirect path from the initial sunlight.