Question

what does the author mean by "cold high- altitude stuff​

Answer 1

Explanation:

Altitude means height above the ground or above the sea level. Common uses include aviation (flying, parachuting, gliding), and geography/surveying. In geometry it is also used as the height of the object itself. Generally, altitude is the distance one thing is above another thing.

Answer 2

Explanation:

At higher altitudes it is colder environment , and at higher altitudes air molecules are less pushing down on u i.e. lower pressure . when the pressure of gases decreases ,temperature also decreases simultaneously thereby at higher altitudes lack of oxygen makes us difficult to breathe and even so our temperature drops which is a risk to us Indeed.