Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Why do the mountaineers carry oxygen cylinder with them while climbing high mountains?

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> The availability of air is not constant at all the places on the Earth. In fact the availability of air decreases ith increase in altitude. Thus due to the less availabilty of air at mountains, mountaineers carry oxygen cylinder with them