We spend an extraordinary amount of time in buildings that are extremely controlled environments, like this building here -- environments that have mechanical ventilation systems that include filtering, heating and air conditioning.
Vi bruger utroligt meget tid inde i bygninger der er ekstremt kontrollerede miljøer, som denne bygning her -- omgivelser der har mekanisk udluftende systemer der indeholder filtrering, opvarmning og klimaanlæg.