Question

substances not having economic value​

Answer 1

Value implies worth. Some resources would have "economic value", whereas some resources will not have value. For instance, metals have an economic worth/value, nevertheless, a beautiful landscape will not have a economic worth/value.

Answer 2

Explanation:

like soil, wood etc are not having economic value or price we can get them freely anywhere

and substance having economic value means that we can't get it free means it costs us ex:- Glass, apple,cotton shirt, rice etc