Question

where is CO come from?

Answer 1

Answer:

your answer is here

Explanation:

Causes. Household appliances, such as gas fires, boilers, central heating systems, water heaters, cookers, and open fires which use gas, oil, coal and wood may be possible sources of CO gas. It happens when the fuel does not burn fully. Running a car engine in an enclosed space can cause CO poisoning. you're welcome