Have you ever thought yourself in the rainy day, without your own car—it means that you should be in a bus full of passenger and there is no enough fresh air because the windows are closed to avoid the water get into the vehicle?Or, try to imagine yourself stuck in the bus shelter, surrounded by the strangers and get wet because the shelter’s roof does not protect you well. Or, you should drive your motorcycle in the rain, crossing the flooded street for the urgent mater related to your work. Would you still think the rain as many people imagine?