Ключевые слова: air, balance, button, c02, carbon, cars, chemical, climate, closeup, co2, coal, concept, danger, dioxide, earth, eco, ecology, element, emission, environment, factory, filter, formula, friday, fuel, future, gas, global, green, household, industry, keyboard, macro, nature, neutral, notation, orange, plants, politics, pollution, power, protection, reduce, smog, smoke, trading, trees, warming, warning,