THE JOURNAL OF CLEANING SCIENCE FALL 2021 VOLUME 3 ISSUE 2 ;OL6MÄJPHS7\ISPJHPVUVMOL*SLHUPUN0UK\ZY`9LZLHYJO0UZP\L ;OL6MÄJPHS7\ISPJHPVUVMOL*SLHUPUN0UK\ZY`9LZLHYJO0UZP\L