Ключевые слова: air, background, business, businessman, carbon, chemistry, clicks, cloud, co2, concept, conservation, dairy, dioxide, eco, ecology, energy, engineer, environment, environmental, exhaust, formula, fumes, gas, global, hand, icons, industry, interface, journal, man, mock, molecular, pollution, protection, report, screen, sign, single, smoke, sources, steam, structure, support, system, teach, technology, up, virtual, write, zero,