Keywords
50 to 54 years, 50 to 59 years, adult, advancement, alone, alternative energy, boomer, caucasian ethnicity, check, color, complexity, concentration, efficiency, energy, engineer, engineering, environment, environmental issue, europe, european, geothermal energy, geothermal power station, green, green color, hard hat, health-and-safety, heavy industry, helmet, iceland, icelandic, indoors, industrious, industry, issue, labor, maintenance, male, man, mature adult, mature man, monitoring, natural resources, northern europe, northern european, older, one person, only adults, only mature men, only men, only one adult, only one man, only one mature man, paying attention, power, power industry, power station, professional, protective clothing, renewable energy, responsibility, reykjanes, scandinavia, scandinavian, science, science collection, single, skill, technology, white, work, working, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u91796401