Our primary source is still coal, and that is not renewable
The term clean source of energy refers to only primary energy sources as wind or solar energy. Electricity, by definition, is not a primary energy source. It is a secondary energy source that is could be produced by a clean energy source as wind or any renewable primary energy source or produced by fossil energy source as oil, natural gas, or coal.
Depends what the source of electricity is.
Electricity is not renewable. It is a energy transmission method. The source it comes from may be. Wind power, etc is renewable. Oil, coal etc is not.
Wind
Not in the literal sense of the words "Mechanical Energy". It depends on the source of the mechanical energy.If the source is renewable, like solar or wind generated electricity, then the mechanical energy is renewable.If the source is non-renewable, like electricity from burning oil, then it is non-renewable.
renewable primary energy
Yes
Renewable. Hydropower, also called hydroelectric power, is the technique of harnessing the power of water to create electricity. It is the world's leading source of renewable energy.
Water (hydro electricity from dams).
Not in the literal sense of the words "Mechanical Energy". It depends on the source of the mechanical energy.If the source is renewable, like solar or wind generated electricity, then the mechanical energy is renewable.If the source is non-renewable, like electricity from burning oil, then it is non-renewable.
The turbines (mills) themselves are non-renewable but the wind the power source that is converted into useful work (usually electricity) is renewable.
The moon's gravitational pull is the source of a renewable energy source. The moon controls the tides, that is where we get tidal energy. We often convert this into electricity.