Pizza shops and steakhouses that use charcoal or wood burners produce significant emissions and damage the environment in major cities. A study of Sao Paulo, Brazil found emissions from wood burning pizza restaurants and charcoal-burning steakhouses posed an emerging environmental risk, despite Sao Paulo's green vehicle policies. The city is home to around 8,000 pizza parlors that produce close to a million pizzas per day using wood burning stoves, negating the positive effects of Sao Paulo's biofuel vehicle policies.