And the coming question is how can Shanghai reduce pollution. 4B shown shows how bicycles can ignite a green revolution. [Applause] Hello everyone.I'm Sean, a fourth grade student from Puno School. Today in my speech, I'll talk about bike sharing, a solution for cleaner air in Shanghai. My presentation covers four parts.The problem of Shanghai traffic and pollution, the benefits of bike sharing and how to overcome challenges in finally a call to action. Firstly, let me talk about the problem we're facing. D ...