Alternative energy resources are the ones that are used in place of fossil fuels and other traditional sources of energy. The main alternative energy sources are solar energy, wind energy, tidal energy, ocean thermal energy etc.
Solar energy is the energy obtained from the sun. Solar energy is considered to be the most important alternative energy resource because it is believed to be unlimited. This is a true fact since sun will exist for ever and thus provide energy for a very long time. Capturing solar energy requires a lot of money to be spent because the equipment required is very expensive.
Wind energy is the kinetic energy of the wind. This energy can be used to produce electricity that can be put to a number of uses. Wind is an unreliable source and hence wind energy needs to be stored for potential use. The storage of wind energy in huge quantities is expensive.
Wave energy is the energy obtained from waves. The waves are used to run turbines which in turn produce electricity. However, waves are unreliable.
Tidal power is the energy that can be harnessed from high and low tides. The main use of tidal energy is in the production of electricity. It is not an efficient source of power generation.
Ocean thermal energy is the energy that can be captured from the ocean in the form of heat. This heat can be used to rotate turbines and hence produce electricity. Ocean thermal energy has a great potential as an alternative energy resource.
So, it is necessary to develop alternative energy resources for substantial development.