The advantages of using public transportation is that we can go to the place that we want to go in time.And it will be more safer than just walking to a far place.But there might be an air pollution,so we should think about that agin.

~> The advantages of using public transportation are we can go to the place that we want in time and it will be much safer than just walking to a far place. But it worsens air pollution, so we should think about that again.