Ключевые слова: air, atmosphere, background, business, carbon, carbon dioxide, carbonic, cloud, clouds, co2, combustion, concept, credit, data, design, dioxide, eco, ecological, ecology, effect, element, emission, emissions, emit, environment, environmental, exhaust, flat, gas, global, graphic, green, greenhouse, icon, illustration, information, isolated, line, nature, object, pollutant, pollution, reduce, reduction, sign, smog, smoke, symbol, system, technology, tonne, toxic, web, white,