Great news from my leading lady, Secretary Hillary Clinton. http://www.nytimes.com/2010/09/21/science/earth/21stove.html?ref=science
The effects of wood-burning stoves and open-fire cooking are detrimental and seen all over Guatemala. Passing through villages one can always spot the houses that do not have improved stoves- the walls of the houses are stained black all the way through to the outside.
While this project doesn't seem to include Central America (sad) hopefully the trend will catch on!