We tend to take our modern gas and electric stoves and ovens for granted, but in many countries, homes have only kerosene or solid-fuel cooking stoves, which can pollute household air. Each year, more than 4 million people die globally of complications from inhaling smoke from these stoves. In a study on the risks, researchers found that clean ethanol-burning stoves are healthier than traditional units. They monitored 324 healthy pregnant Nigerian women: Half used ethanol stoves, and half used w…