Original sentence: However, one must take into account that the carbon monoxide, which is part of the wood gas, is very toxic, while being difficult to notice due to its odorless and colorless nature
Edited sentence: An alternative stove based on the downdraft principle and typically built with nested cylinders also provides high efficiency.Combustion from the top creates a gasification zone with the gas escaping downwards through ports located at the base of the burner chamber.Most of the CO produced by gasification is oxidized to CO2 in the secondary combustion cycle, therefore gasification stoves carry lower health risks then conventional cooking fires.The gas mixes with additional incoming air to provide a secondary burn