As we meet here in New York, women are cooking dinner for their families in homes and villages around the world. As many as 3 billion people are gathering around open fires or old and inefficient stoves in small kitchens and poorly ventilated houses. Many of the women have labored over these hearths for hours, often with their infant babies strapped to their backs, and they have spent many more hours gathering the fuel. The food they prepare is different on every continent, but the air they breathe is shockingly similar: a toxic mix of chemicals released by burning wood or other solid fuel that can reach 200 times the amount that our EPA considers safe for breathing.