Based on I RENA’s estimate, the life-cycle cost over a 12-year cooking period would be $124, $225, $303 and $129 for ICS, LPG stoves, electric stoves and biogas digesters, respectively. From the socio-environmental perspective, IRENA ranks biogas digesters highest, followed by LPG stoves, electric stoves and ICS. Figure 23 presents a matrix of socio-economic and environmental benefits from promoting different clean cooking fuel technologies.