What are the sources of electricity available in the world today ?

 The sources of electricity available in the world ..Commodity Advantages Disadvantages

• Coal

 • Advantages : relatively low costs


• Disadvantages : plentiful supplies • produces air and water pollution

• produces ash requiring disposal.

• Hydropower

 • Advantages : no pollution


• Disadvantages : very low operating costs • may cause the modification or destruction of ecosystems


• virtually all potential hydro locations are already developed

• Natural Gas

 •Advantages : low generating costs • supply and price can fluctuate


•Disadvantages :  produces air pollution, though less than some other sources.

• Nuclear

• Advantages : does not produce air or water pollution


• Disadvantages  : low operating costs • produces radioactive waste requiring carefully controlled storage


• high initial capital costs.

• Oil

•Advantages :  easy to use and transport • produces air and water pollution


•Disadvantages :  suppy and price can fluctuate


• expensive

• Solar

• Advantages : inexhaustible supply


• Disadvantages :  no pollution • large scale projects require much land


• requires expensive photovoltaic cells


• too small-scale for urban areas

• Wind

 •Advantages :  inexhaustible supply


•Disadvantages :  no pollution • large scale projects require much land


• wind doesn't always blow when electricity demands are high


• extremely noisy


• too small-scale for urban areas