Fossil fuels
Fossil fuels are non-renewable form of energy such as coal, petroleum, or natural gas that have high carbon content and are formed by the decomposition of organic matter.
Renewable energy
Renewable energy is generated from natural resources such as the sun, wind, and water that are inexhaustible or replaceable.
Centralized generation
Centralized generation refers to electricity that is produced at large power plants and transmitted great distances through power lines to the end user.
Distributed generation
Distributed generation refers to electricity that is produced very near to where it is used, such as a rooftop solar electric system.