Both solar and wood seem to not see much use in comparison with biomass, both from the quick google search I did and from my personal experience. In more rural areas biomass (wood, leaves, peat, etc.) seems more common, I urban areas there is a mix. Here in China, coal is a common cooking fuel in cities as well. Refueling and transportation costs seem like the main obstacles to widespread use, as per the UN resource below.
360 by bike 
How does propane used as fuel in 3rd world countries compare with wood or solar?
LikeLike
Both solar and wood seem to not see much use in comparison with biomass, both from the quick google search I did and from my personal experience. In more rural areas biomass (wood, leaves, peat, etc.) seems more common, I urban areas there is a mix. Here in China, coal is a common cooking fuel in cities as well. Refueling and transportation costs seem like the main obstacles to widespread use, as per the UN resource below.
Click to access cooking.pdf
Click to access lp_gas.pdf
LikeLike