Renewable energy resources are the sources that can be replaced / generated at the same rate that they are being utilised.

Biomass is organic material made from plants and animals. Some examples of biomass fuels are wood, crops, manure, and some waste. When burned, the chemical energy in biomass is released as heat. Biomass can be converted into other usable forms of energy like methane gas or transportation fuels like ethanol.

Largest source of electricity from renewable sources. Needs guaranteed supply of water. Kinetic energy of water rotates turbines which generate electricity.

geothermal energy is heat from within the earth. We can use the steam and hot water produced inside the earth to heat buildings or generate electricity.

Each wind turbine can produce between 1/4 and 2 MW of electrical power. Wind farm needs to be located where there is high wind speed.

Solar energy is the sun’s rays (solar radiation) that reach the earth. Solar energy can be converted into electricity in two ways: Photovoltaic (PV devices) or “solar cells” – change sunlight directly into electricity. Solar Power Plants - indirectly generate electricity when the heat from solar thermal collectors is used to heat a fluid which produces steam that is used to power generator.

There are no waste products, and do not pollute the water or the air.

The amount of sunlight that arrives at the earth's surface is not constant. large surface area is required to collect the energy at a useful rate. Require a lot of investments ; more expensive than oil and gas.

Oman has a good opportunity to use solar energy because it has a large sun shine. More research should be done to reduce the cost of renewable energy uses. Householders have to use solar energy to reduce the electricity ills at homes.