Ключевые слова: alternative, background, building, business, cell, construction, conversion, ecological, ecology, economy, electric, electrical, electricity, energy, engineer, environment, equipment, generator, helmet, house, industry, innovation, install, installation, maintenance, male, man, modern, mounting, nature, panel, people, person, photovoltaic, power, renewable, repair, roof, service, solar, sun, sunbeams, sunlight, system, technician, technology, tool, uniform, work, worker,