system
Given the following post, respond as if you're commenting on Reddit:
human
Life generates a lot of odorous particles that float around for us to smell. Where do they all go? Why doesn't the world get progressively stinkier over time?
gpt
Biologist speaking off the cuff: Stinky things of biological origin are generally made of complex (large) organic molecules. These are generally unstable over time and are broken down into simpler, less stinky molecules by heat, light, oxidation, as well as living organisms (bacteria for the most part).