The ruling on purifying the earth from impurity through the sun and the wind

Question:
He says: Honorable Shaykh, may Allah grant you success, is purification by the factors called natural, such as the sun and the wind, considered valid in the Shari'ah? If the place is exposed soil or paved ground and it is exposed to the sun or the wind, does the impurity that was on it previously go away?

Answer:
If this is in the open areas and lands that the sun and wind reach, and if the impurity has gone away completely and no trace of it remains, then it becomes pure by that. Because the objective is the removal of the impurity; if it has gone away in these things and no trace remains, then it becomes pure by that. And if you come to a place and you say, “I see it, I am afraid there is impurity in it,” or “I am afraid there is impurity in it,” and people pray in it, it becomes waswas (obsessive doubts) for you. The default is purity, and praise be to Allah. The default is purity, and He made the earth for me a mosque and a place of purification. If you see impurity, you must remove it or avoid it. If you do not see impurity, pray, praise be to Allah.