1. Hygiene: The paper packaging in the fast food restaurant is disposable and sanitary.
2. Recyclability: Most disposable products can be recycled, such as paper and plastic.
3. Law: The law has certain restrictions on disposable products. As long as it does not violate the law, it will not cause too much damage to the environment.
4. Medical supplies: many medical supplies must be disposable, which is not a problem of the environment, but a problem of human life.