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In the future, mass transportation will be widely used. With the increasing attention to environmental protection, we began to do research and develop ideas. We find that the "chimney effect" has always existed in our lives which can generate strong momentum. Compared with other energy sources, it is less polluting and more efficient. After experiments and research, we finally designed a new type of public transportation vehicle with "chimney effect" as the power source, replacing the traditional power source，then Design a new public transportation vehicle.