what happens when the alveoli are destroyed?
It is decrease in oxygen?
Since this is not my area of expertise, I searched Google under the key words "what happens when alveoli are destroyed" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=what+happens+when+alveoli+are+destroyed&ie=UTF-8&oe=UTF-8&gws_rd=ssl
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.