Carbon Monoxide (CO) Carbon monoxide (CO) is a deadly poisonous gas which cannot be seen, smelled or tasted. Signs and symptoms of CO poisoning may include: headaches, sore muscles, confusion, irritability, sleepiness, nausea, vomiting, irregular heartbeat, impaired vision/coordination, fatigue, shortness of breath and death. Appliances and other items that burn fuel may be a source … Continue reading Carbon Monoxide