system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is there a lot of air in a chip bag?
gpt
It's actually nitrogen. They replace the air with nitrogen to inhibit the growth of air-breathing bacteria and increase the shelf life of your chips.  
Also, by partially inflating the bag there is less likelihood of the contents being all broken and smashed by the rough and tumble of transportation.