First Is Worst

Business Traveler (USA) - - TAKE OFFS & LANDINGS -

Although dry air might not cause harm, it does con­trib­ute to dis­com­fort. As you’d ex­pect, the hu­mid­ity lev­els on an air­craft dif­fer from cabin to cabin and de­pend on the du­ra­tion of the flight. On long-haul flights, I have mea­sured hu­mid­ity lev­els and found them to be 10 per­cent on av­er­age.Vari­a­tions oc­cur be­cause of the num­ber of peo­ple ex­hal­ing, so the more

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