distinguish between commercial and non commercial sources of energy

commercial energy:

1.commercial sources of energy have a market as these are bought and sold

2.as these are bought and sold they command a price

3.these sources of energy are largely used for industrial and commercial purposes

4.these sources of energy are generally exhaustible

eg:coal,petroleum,etc

non commercial energy:

1.these sources do not have a market.these are generally free.they are found in forest or nature

2.they do not command a price

3.used for domestic consumption

4.these sources are renewable

eg:firewood,agricultural waste ,etc