Sources of Energy
* A non-renewable source of energy is one that cannot be replenished in a short period of time.
Non-renewable fuels are classified as:
* Fossil fuels like coal, oil and natural gas
* Nuclear fuels like uranium, tritium and thorium
* A renewable source of energy is one that can be replenished within a short period of time.
Renewable sources of energy can be classified as:
* Solar energy
* Wind energy
* Hydro energy
* Biomass energy
* Geothermal energy
* Tidal energy
* Ocean thermal energy
A good source of energy is one that enables us to do a large amount of work per unit volume or mass, is accessible, economical and easy to store and transport.