Question

What other locations have clean cardboard sheets? Why did these sheets remain clean?

please give correct answer if you give correct answer I will give you points​

Answer 1

Answer:

$\huge\gray{\mid{\fbox{\tt{Answer}}\mid}}$

Explanation:

Leading food manufacturers are changing their packaging because of health concerns about boxes made from recycled cardboard, the BBC has learned. Researchers found toxic chemicals from recycled newspapers had contaminated food sold in many cardboard cartons

Answer 2

Answer:

what other location have clean cardboard sheets? why did these sheets remain clean?