Solar power technology could help to reduce deaths caused by household pollution. Pollution trapped inside homes and other buildings kills more than 4 million people each year. Most of these deaths are in the developing world, mainly in Africa. Many people die as a result of breathing smoke or from cooking over wood- or coal-powered stoves. One way to reduce the number of deaths is through cooking equipment powered by the sun. Crosby Menzies is a solar power expert with SunFire Solutions, a South African company. He described his latest solar cooker, called the ‘Sol-4.’ “It is four square meters of mirrors, six to eight meters in length. It is quite a large cooker. We are very pleased to have built the first one in South Africa.” Solar cookers work by reflecting light from the sun off large mirrors. The mirrors direct the light at a cooking pan. Then the light heats the pan with solar energy.