Coal
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.
Electricity is a secondary energy source which means it is produced from primary energy sources such as oil, gas, nuclear energy, wind, coal, solar, etc. It may be called an energy carrier.
Electricity is electricity and is handled in the same manner no matter what source produced it.
It provides about 19 percent of US electricity and about 16 percent world-wide
The energy source you mean must be coal, but you seem to have two questions mixed together
Coal - about 50 percent of total
For electricity it is still coal, at about 50 percent. For transport it is oil.
possibly six percent
noelectricity is a source of energy
Energy produced by wind turbines does not require any waste disposal. 9.8 percent of the energy consumed in the state of Michigan is produced from wind turbines.
No, because electricity is a secondary energy source, so it's produced by primary energy sources like coal, natural gas, oil, nuclear power, and other natural energy sources.
The Sun isn't our primary source of energy. The world still relies on burning fossil fuels as a main source of energy. Solar power only provides one percent of the world's electricity production.