Hydroelectric power plantsThe energy produced by water can be captured and turned into пустоelectricity . The use of a dam on a river allows пустоhydroelectric power plants to store water in an artificial lake, or пустоreservoir . When released, the force of the water spins the blades of giant turbines, which are connected to a пустоgenerator producing energy. Hydropower is one of the most important renewable energy пустоresources , because it is reliable, efficient and does not pollute the пустоair . Although it has high initial costs, it is пустоcheap to operate. Unfortunately, it has a great impact on the пустоenvironment , as humans, animals and plants may lose their natural habitats.