According to the World Health Organization, cooking over an open fire inside the home is the equivalent to the smoke exposure of inhaling two packs of cigarettes a day. Nearly half the world’s population – 2.6 billion people cook over inefficient wood or dung - burning open fires inside their homes, which contributes to 4.3 million deaths a year; more than HIV, malaria, and tuberculosis combined. In addition, emissions from open fires contribute to as much as 2% of global warming.