Why is the switch to gas for cooking still so slow in Africa?

The latest estimates from the Institute for Health Metrics and Evaluation put the number of household pollution-related deaths globally at around 1.6m out of a total of 3m deaths related to poor air quality, so it is a significant contributor. Fortunately, there is a solution that is already available in the form of Liquefied Petroleum Gas (LPG) that can go a long way to mitigating this death toll.