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Acclimatization is the most common technique. Altitude sickness occurs at 2,400 m, so you go to a base camp (for example Cuzco if you're doing the Incan trail, or the South/North Base camps for Ev...
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Acclimatization is the most common technique. Altitude sickness occurs at 2,400 m, so you go to a base camp (for example Cuzco if you're doing the Incan trail, or the South/North Base camps for Ev...