Energy can be classified into two broad categories: renewable energy and non-renewable energy. Renewable energy sources can be continuously reused because they are abundant in nature. All are non-polluting, but devices used to collect energy can have a negative impact on the environment. They are free, but producing storage equipment or converting it to another form of energy can be expensive. Examples of the use of renewable energy are the solar panel, which is an assembly of solar cells. Solar cells convert solar energy into electrical energy. Solar panels are very expensive even if they cost nothing to operate. They are installed in places that must be sunny. The efficiency is 10 to 20%. The environmental impact is that it requires very large areas, 40 km² are necessary to produce the power equivalent to a modern power plant. Does not cause pollution but the production of storage devices raises environmental concerns. The wind turbine is a device that converts the kinetic energy of the wind into the kinetic energy of the turbines. The turbines spin to produce electricity but they only work when there is wind. The efficiency is 30-40%. Environmental impacts are the need for many large turbines to generate electricity, which can be noisy and unsightly. Turbines can endanger birds and bats. Hydroelectric power station is where electricity is produced when water from an upstream reservoir flows downward. The gravitational potential energy of the water transforms into the kinetic energy of the flowing water which drives the turbines to produce electricity. The efficiency is over 90%. The environmental impact of flooding is widespread over a wide area and affects the ecology of the region. Can cause drought downstream if not managed properly, does not cause air...... middle of paper ...... bines in Port Elizabeth are used to create kinetics and the turbines are powerful enough to power a small town. The Coelga Wind Farm was the first wind farm built in South Africa, in the Eastern Cape region; Thanks to the success of the wind farm, many other parks have been built. The problem with wind turbines is that they cannot be used in a place like Gauteng because the wind is minimal and the wind turbines cannot rotate and no electricity can be produced. South Africa wastes a lot of money on non-renewable energy. sources to create electricity, for example coal. The construction of wind turbines, hydroelectric power stations, etc. is expensive, but once built it is free because it uses renewable energy sources. They do not contribute to global warming unlike nuclear power plants which are extremely harmful to the air. There is also a risk of an accident like that of Chernobyl..