is carbon monoxide a byproduct of natural gas
Some processes in modern technology, such as iron smelting, still produce carbon monoxide as a byproduct. Worldwide, the largest source of carbon monoxide is natural in origin, due to photochemical reactions in the troposphere that generate about 5 Ã 10 kilograms per year. Other natural sources of CO include volcanoes, forest fires, and other forms of combustion.