the.com/freshness
the quality everything has the instant before it begins betraying you.
smell of rainPetrichor is bacteria farting after a dry spell.
new carThat scent is off-gassing plastics, slowly poisoning you.
cut grassThat smell is grass screaming a chemical distress signal.
expiration datesMostly guesses; food often fine long after.
freshly bakedBread staling is starch recrystallizing, not just drying out.