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architecture, barrier, clean drinking water, clean electricity, clean energy, concrete, construction, dam, danger, drinking water, ecosystem preservation, electric, electricity, energy, engineering, environment, environmental, flood control, flow, forest, generation, generator, green, horizontal, hydraulic, hydro, hydroelectric, hydroelectricity, hydropower, industry, irrigation support, lake, landscape, nature, norway, plant, power, reservoir, reservoirs, river, station, supply, sustainability, sustainable, sustainable energy source, technology, turbine, water, waterfall,