Ключевые слова: aerial, air, black, calamity, chimneys, city, contamination, dron, drone, dust, ecology, emission, energy, europe, factory, flight, fly, flying, foundry, health, hot, iron, limits, metal, nature, ostrava, pipe, poison, pollution, power, processing, production, quadcopter, quick, refinery, rises, serious, shot, show, situation, sky, smog, smoke, smoking, station, steel, streaming, trees, video, view,