From natural sources such as forest fires, biochemical reactions, including the decomposition of organic compounds in water, soil and compost will cause methane. Carbon dioxide, ammonia, etc.
Natural origin, such as wildfire occurrence and biochemical reactions are generally rotten fermentation of organic compounds in water, soil gas, carbon dioxide, methane, ammonia, etc.
from natural sources such as forest fire, had reacted biochemistry, including corruption and fermentation of Organic Land in the water will cause gas carbon dioxide emission of ammonia, etc.