Can any one tell me what clean energies are? and what are their advantages and disadvantages? how to use them?

Question

and by the way .... plz! let me know:

What are clean energies' advantages and disadvantages?

How to use clean energies?

Can clean energies take the place of the current energies?

Answer 1

"Clean", or renewable, energy sources are energy sources that are continuously replenished by natural processes. They are _flows_ of energy (from the Sun or the planet's hot core) while fossil and nuclear fuels are to great extent _stocks_ of energy (stored, accumulated energy).

According to the World Energy Assessment report (2004) “Renewable energy sources generally depend on energy flows through the Earth’s ecosystem from the insolation of the sun and the geothermal energy of the Earth”.

Broadly, the following are renewable (clean) energy sources:

* Biomass energy (plant growth driven by solar radiation)

* Wind energy (moving air masses driven by solar energy)

* Direct use of solar energy (as for heating and electricity production).

* Hydropower

* Marine energy (such as wave energy, marine current energy, and energy from tidal barrages)

* Geothermal energy (from heat stored in rock by the natural heat flow of the Earth)

If you ask me, if the current reliance on fossil fuels and nuclear can be substituted by use of renewable energy listed above, then my answer would be: "Yes, of course!". However, to be realistic here, this process will require decades to make such a transition and a lot of political and individual will and commitment.