Since 2010, the non-profit organisation Die Ofenmacher e.V. has been pursuing the goal of installing safe stoves with smoke vents in as many rural households as possible in emerging and developing countries. The initial focus was on Nepal, but there are now also projects in Ethiopia and Kenya. A total of almost 106,616 stoves have been built so far (as of April 2021), and because the stoves are 50 percent more efficient than traditional open fires, a saving of over 350,000 tonnes of CO₂ has been achieved. In cooperation with local NGOs, the association organises the training of local stove builders who construct simple stoves with a smoke outlet. The materials for a stove are available locally (clay, sand, chaff, sawdust) or can be easily procured in the country. The technology, which has been adapted to local circumstances, means that most of the added value from the construction of the stoves remains in the country. We offer CO₂ certificates for retiring to supporters of the Development and Climate Alliance.