Disposable plastic plates should not be used because
(a) they are made of lightweight materials.
(b) they are made of toxic materials.
(c) they are made of biodegradable materials.
(d) they are made of non-biodegradable materials.
(d) they are made of non-biodegradable materials
Disposable plastic plates cannot be degraded by micro-organisms and hence should not be used. They will remain as such in the environment and pollute it.