About 24 years ago, I was in a house in a small village some distance from Udaipur town in Rajasthan. A government functionary was explaining how an improved chulha (cookstove) worked— they had installed it in the kitchen. At that time, India was waking up to forests being devastated. It was believed then (wrongly, as it turned out) the key reason was poor people cutting trees to cook food. It was also being understood smoke from chulhas was carcinogenic and that women were worst hit by this pollution.