Conventional:
1. These energy resources are exhaustible once used cannot be replaced.
2. Cause environmental pollution.
3. Expensive sources of energy.
4. Coal, petroleum, natural gas etc are the main conventional sources of energy.
Non conventional:
1. These are non exhaustible that can be renewed in a short period.
2. Do not cause environmental pollution
3. Cheap sources of energy or free gift of nature.
4. Solar energy, wind energy, tidal energy, nuclear energy are the major conventional sources of energy.
