Millions of library books are deteriorating because ______.
A) there is too much humidity in library buildings
B) the ink used in printing the books is eating through the paper
C) the glue holding the books together is drying out
D) the books were printed on acid-based paper, which is turning brittle
E) nobody wants to take care of them

Question

Quizplus · Accepted Answer

Many library books were printed on acid-based paper, which breaks down over time and causes the paper to become brittle and yellowed. As a result, millions of books are deteriorating and becoming unusable.

Millions of Library Books Are Deteriorating Because ______