🐄🍪 An Intel Fab in Arizona was seeing a sharp decline in yields when producing their chips at night.
Engineers were really puzzled why between 1 and 2AM the yields were so bad.

Turned out that at night, the direction of the wind was changing. Methane, from cow farts from nearby dairy farms, ended up in the cleanrooms via the air conditioners.

Intel didn't figure out how to solve the problem, so they just paid the three neighbouring farms to move.