A watermill uses a large wooden or metal wheel to generate power. It consists of many small blades, over which the flowing water of a stream runs; this wheel is called the ‘water wheel’. The flowing water rotates the wheel. This rotational movement produces electricity when connected to a generator. Although mills were used to generate hydropower in earlier times in all countries, people in the underdeveloped countries use them even today. Electricity produced in such a manner is pollution free and does not harm our environment.
