Does the recycling process cause any pollution?
Generally speaking “no” as the aim is to recover as much of the original material as possible. In cases where water or some other solvent is used in the recovery process every effort is made to recycle the water and to extract any contaminants in the process. As a rule, the cost and process of recycling should not outweigh the net environmental benefit e.g. there could be negative environmental outcomes if recyclables are transported long distances.