Is it obligatory to collect discarded newspapers containing the name of Allah?

Question:
And another says: I am a citizen who is zealous for the religion. I have a problem: when I walk on the road, I find newspapers and magazines thrown on the road and in the garbage, and I pick them up and keep them because they contain the name of Allah (Glorified and Exalted is He). So, if I leave them, is there a sin on me? I ask for an answer to this question.

Answer:
You will be rewarded; may Allah reward you with good. If you find papers on the road containing the remembrance of Allah and you pick them up and bury them in good soil or burn them, you will be rewarded. It is not permissible for people to throw papers containing the remembrance of Allah on the roads, in the garbage, or in the dumps; it is not permissible. It is obligatory for anyone who has any of this to keep it until he buries it in good soil or burns it. As for throwing papers that contain the remembrance of Allah, or verses, or hadiths from the Messenger (peace and blessings be upon him), onto the roads, in the trash, in the garbage, or in anything that is desecrated, this is not permissible. It is obligatory for anyone who sees any of this to pick it up and take care of it until he places it in good soil to bury it, or burns it, or keeps it with the books in the country if it contains benefit.