Why is there a glass cover above salads?

There are a few reasons why you might see a glass cover over salads in a restaurant or grocery store:

* To keep the salad fresh. The glass cover helps to prevent the salad from drying out and wilting. It also helps to keep the salad from becoming contaminated with airborne bacteria or dust.

* To prevent cross-contamination. In a restaurant setting, a glass cover helps to protect the salad from being sneezed or coughed on by customers or staff. It also keeps the salad from being accidentally touched by hands or utensils.

* To enhance presentation. The glass cover can help to create a more visually appealing presentation for the salad. It can also help to keep the salad chilled, which can enhance its appearance.

In some cases, the glass cover may be used for a combination of these reasons.

It's important to note that glass covers don't eliminate the need for proper hygiene practices. Salads should still be handled with care, and any surfaces that come into contact with the salad should be properly sanitized.