Why is harder to breathe

Why is it harder to breathe when climbing up behind mountain
1. 1 answer
2. 33 views
Why is it harder to breathe while climbing up a high mountain?
1. 1 answer
2. 56 views
Why is it harder to breathe when climbing up a high mountain?
1. 3 answers
2. asked by sebastian chapa
3. 891 views
why is it harder to breathe when climbing up a high mountain
1. 1 answer
2. 70 views
Why is it harder to breathe when climbing up high mountain
1. 1 answer
2. 107 views
Why is harder to breathe when climbing up a high mountain?
1. 1 answer
2. 12 views
Why is it harder to breathe when climbing up a high mountain
1. 1 answer
2. 118 views
Why is it harder to breathe when climbing up a high mountain?(1 point)
1. 1 answer
2. asked by Anonymous
3. 509 views
Why is it harder to breathe when climbing up a high mountain?the air has more moisture
1. 1 answer
2. 234 views
Why is it harder to breathe when climbing up a high mountain?(1 point)
1. 1 answer
2. 60 views