That was my take-away too. They had an idea to fix a problem, it worked but not as well as hoped, so now they're learning and iterating. Sounds like any experi

That was my take-away too. They had an idea to fix a problem, it worked but not as well as hoped, so now they're learning and iterating. Sounds like any experimental project (or startup). They got 28 million stoves out with a budget of $10m/year (times 5 years?). Big deal if they haven't saved the world yet.