Based on the context and the answer, generate a question. 

Context: Unlike outside and backstage , it was cool in the bus . He mentally thanked their bus driver for switching on the airco this morning as he made his way to the living room area . He flopped down on the large , brown sofa and closed his eyes , sighing again .

Answer:

To combat the sunny weather outdoors .



Why would the air in the bus be turned on ?