The article discusses the use of alternative fuels in urban transport in Brazil to address environmental concerns. New technologies and energy sources are being explored to reduce emissions and promote sustainability. Factors like environmental issues, energy security, and industry interests are driving the development of alternative fuels. However, the cost of alternative fuels and the evolution of oil prices are limiting factors. Some alternative fuels being considered include oxygenated gasoline, natural gas, electricity, hydrogen, and renewable fuels.