What is the porpuse of harmful materials like muriatic acid?
A. it is used for sanitization
B. it is used to wash clothes
C. it is used to wash dishes
D. it is used to clean dirty and stained sinks
What can we do to old books,papers, and newspapers?
A. burn them
B. throw away into the dumpsite
C. donate it to some libraries
D. made them into fine crafts and sale them

Cutting of trees are prohibited. what are the materials that we can get from trees?
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