The garage should be kept well ventilated in order to guard against: 1.fire 2.carbon monoxide poisoning3. carbon dioxide poisoning 4. heat loss

The answer would be 2, Carbon Monoxide poisoning. It is an invisible gas that can easily build up in a non-ventilated area and is a primary gas in car exhaust, making it a danger in a garage. It is poisonous.

Number one is kayaking number two is communication skills