From Tibet to the Andes to the highlands of Ethiopia, millions of people work at high altitude. What does that mean for their health and for the companies that employ them? Show more
Discover 11,128,835 listings and 279,758 playable programmes from the BBC
From Tibet to the Andes to the highlands of Ethiopia, millions of people work at high altitude. What does that mean for their health and for the companies that employ them? Show more
The BBC's international radio station
