These sources of energy are non renewable.
They cause large scale pollution.
These sources are renewable.
They are Eco friendly sources of energy.
Generation of energy is expensive.
These sources of energy refer to traditional sources of power like charcoal, ,firewood, coal, petroleum, etc.
These sources of energy are recently developed sources of energy from Sun, rwind, water, tides, geothennal, etc.
Initial cost of generation is high but cheaper in the long run.