Ключевые слова: air, air pollution, blue, blue sky, building, chemical, chemicals, chimney, climate change, climbers, co2, contaminate, contamination, dangerous work, dioxide, ecology, emission, energy, environment, environmental protection, exhaust, factory, fitter, fume, global, global warming, greenhouse effect, height, industrial, industrial climber, industrial pipe, industry, ozone, pipe, plant, pollute, pollution, red, sky, sky background, skyscraper, smog, smoke, smoke cloud, smokestack, steam, vapor, warming, white, worker,