Ключевые слова: alternative, background, battery, cloud, concept, design, eco, ecofriendly, ecological, ecology, electric, electricity, energy, environment, environmental, facilities, factory, flat, generation, geothermal, green, hydro, hydroelectric, illustration, mountains, natural, nature, planet, plant, power, protection, renewable, river, solar, station, sun, sustainable, symbol, system, technology, tree, turbine, water, wind,