Everything from the safety of the medications we take to the regulations that protect us from over-exposure to potentially dangerous chemicals relies on accurate, standard measurement.
Metrology is behind the standards that ensure you get what you pay for when you fill your car with gas or pick up a couple steaks for the barbecue. It provides the structure that allows modern life to go on in a safe and orderly fashion. Without standard, accurate measurement, modern life could get pretty chaotic.