Nowadays, more and more people use garbage bags, because garbage bags are cheaper and more convenient to use. Garbage bags are mainly used to hold garbage. We can see many garbage bags in high-speed rail or other public places. Many of these garbage bags are sealed. What is the reason?
  Everyone has the experience of shopping in the supermarket. Recyclable plastic bags should have been used a few years ago. In the past, the plastic belt on the train can't be recycled, but now you can see that this kind of garbage bag is recyclable material, and the previous kind of plastic bag is really poor material, it's easy to break, sometimes it's garbage bags that are rubbed by something before taking off the train, and it's easy to dump all the garbage on the platform. It's really unsanitary. Secondly, it is much more beautiful. I think many people will feel very beautiful and generous when they see such garbage bags, instead of being piled up on the platform of the railway station.
  Therefore, there are three main reasons why garbage bags need to be sealed: first, to protect the environment, second, they are hygienic and do not give off delicious food, and third, they are relatively beautiful.