Pizza shops and steakhouses that use charcoal or wood burning stoves produce significant emissions and damage the environment of major cities, according to a new study in Sao Paulo, Brazil. The study found emissions from thousands of pizza shops and domestic waste burning contribute to air pollution in Sao Paulo despite its green vehicle policy. A scientist estimates over 300,000 tons of wood is burned annually by pizzerias and steakhouses in Sao Paulo, negating the positive environmental effects of its biofuel policy for vehicles.