Let’s start with the terrifying, stupefying basics: the leading source of climate emissions per household in the developing world, causing more death and disease from household air pollution than tuberculosis, malaria, and AIDS combined, and one of the biggest drivers of the deforestation ripping the lungs out of our planet is…. making dinner. Every day more than two billion people suffer through toxic smoke from fires of wood, charcoal, or even dung in their homes.