Carbon monoxide (CO) is an invisible killer. You can’t smell it, see it, or taste it. It’s a poisonous gas that comes from combustion sources such as car engines, gas generators, furnaces, grills, fireplaces, wood stoves, and gas or kerosene space heaters. Every year, carbon monoxide accidentally kills about 150 people in the United States. Many more people suffer CO poisoning due to faulty furnaces and appliances. Symptoms of CO poisoning include headaches, nausea, difficulty breathing, dizziness, drowsiness and becoming light-headed. […]