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can be used for pumping water or grinding grain. A modern electrical wind turbine converts the force of the wind to electrical energy for consumption on-site and/or export to the electricity grid. wetlands – areas of permanent or intermittent inundation, whether natural or artificial, with water that is static or flowing, fresh, brackish or salt, including areas of marine water not exceeding 6 m at low tide. . Engineered wetlands are becoming more frequent and are sometimes called constructed wetlands. In urban areas wetlands are sometimes referred to as the kidney of a city. well-being – a context-dependent physical and mental condition determined by the presence of basic material for a good life, freedom and choice, health, good social relations, and security. water treatment – the process of converting raw untreated water to a public water supply safe for human consumption; can involve, variously, screening, initial disinfection, clarification, filtration, pH correction and final disinfection. water quality – the microbiological, biological, physical and chemical characteristics of water. water cycle passage of the water between the oceans and waterbodies, land and atmosphere.