Sustainability is the method of using a resource to ensure its long term availability.
Explanation:
It is the balance between the human and ecosystem, the use f resources in a manner that they are not depleted.
Sustainability has been a matter of concern especially in the environmental protection and development debate. The idea being, advancement in development with means that ensure a safe environment for its conservation so as to ensure its continuity for the benefit of current and future generations.
This is because Jim Crow laws are the laws of racial segregation in the United states that existed from just after the Civil War up until the mid-sixties which is same as the 'To Kill a Mockingbird' by Harper Lee.