Question

Why it is not advised to burn plastics and synthetic fibres

Answer 1

plastic and synthetic fibres are not allowed to burn out because it religious lot of seo2 and also the Residue is very hard to decompose

Answer 2

A synthetic material which can be easily moulded into any desired shape on heating is called a $\textbf{plastic}$.

Synthetic plastic don't not completely destroyed pn burning. During burning they produce poisnous fumes. Thus burning of plastic causes severe air pollution. So it is not advised to burn a plastic or synthetic fibres.