Natural origin, such as wildfire reaction biochemical decomposition and fermentation are generally of organic compounds in water, soil gas, methane, carbon dioxide, ammonium, etc.
Natural sources include forest fires, biochemical reactions, including putrefaction and fermentation of organic matter in the water. The soil will cause methane Carbon dioxide, ammonia, etc.
Natural sources such as wildfire reaction biochemistry, including decomposition และหมัก of organic matter in water, soil, will cause the gas methane. Carbon dioxide, ammonia, etc.!