Ключевые слова: advert, advertisement, air, art, atmosphere, background, breath, breathe, breathing, carbon dioxide, city, cityscape, clean, cleanliness, climate change, climate change day, concept, dioxide, dust, earth day, eco, ecological, ecologists, ecology, ecosystem, environment, environment day, factory, global, health, healthy, illustration, industry, lung disease, lungs, mockup, oxygen, ozone, pipes, polluted, pollution, refresh, save, save the planet, smell, smog, smoke, symbol, town, urban,