(No country on earth has such a great range in altitude, from 150 m/500 ft to the 8,848 m/29,028 ft summit of Everest.)
When going up Everest, it is wise to be careful of the altitude change.
mnli hypothesis: When going up Everest, it is wise to be careful of the altitude change. premise: (No country on earth has such a great range in altitude, from 150 m/500 ft to the 8,848 m/29,028 ft summit of Everest.)