Reported about 1 year ago
Maintaining a lower temperature inside the aircraft cabin is done to protect passengers, as explained by a former flight attendant, taking into consideration health risks such as passengers feeling lightheaded or dehydrated. The cold temperature helps prevent passengers from fainting and reduces the risk of dehydration, in addition to lowering the risk of disease transmission and keeping passengers alert for emergency situations, enabling them to follow safety instructions and react more quickly.
Source: YAHOO