Ключевые слова: air, app, art, atmosphere, badge, black, carbon, chemistry, climate, cloud, co2, concept, decrease, design, dioxide, ecological, emission, energy, environment, exhaust, factory, gas, global, global warming, glyph, graphic, green, greenhouse, icon, illustration, industry, isolated, label, logo, nature, pollute, pollution, reduction, sign, simple, sky, smog, smoke, solid, symbol, warming, warning, web,