Ключевые слова: air, aqi, atmosphere, background, breath, cancer, capoc, cell, climate, cloud, cloudy, cotton, danger, dirty, disease, doctor, dust, environment, float, fluffy, fog, grey, health, icon, illustration, infection, isolated, medical, mist, nature, outdoor, ozone, pattern, pm 25, pollution, problem, realistic, research, science, sign, sky, smoke, symbol, text, texture, weather, white,