What is the different use of carbon dioxide?

The use of carbon dioxide is related to its properties.Under normal conditions, carbon dioxide is a colorless, odorless, mildly acidic gas. It does not help breathing.

But carbon dioxide is an inert gas. For this reason it is used for various purposes.  Carbon dioxide is one and a half times heavier than air. Carbon dioxide is highly soluble in water. It forms carbonic acid when dissolved in water.