Nice article about the positive impact of improved cooking stoves in Pakistan. It's important to note that they are building the stoves themselves out of local clay, and it is making a positive and immediate difference in the reduction of smoke and the amount of wood used. I'm not sure what type of stove is being used.

PAKISTAN: Smoke-free Stoves A Godsend for Village Women
By Zofeen Ebrahim

THATTA, Pakistan, Feb 25 , 2010 (IPS) - Forty-something and unlettered, Sona Siddiqi never imagined she would become the most sought-after woman in her village of Ramzan Katiar.Air Jordan