Please answer in complete sentences with detailed explanation

1. How are some other federal environmental laws used in conjunction with NEPA? (Examples are the Clean Water Act, the Endangered Species Act, and the Historic Preservation Act.)
2. How is public participation incorporated into the NEPA process? Where is it required? Where is it optional?
3. How does the U.S. border fence case illustrate the necessity for federal public agencies to work together within NEPA mandates?
4. How do Federal and most State agencies use EIA in their land use planning processes? (For example, the use of land for timber harvesting).
5. Relate how NEPA has been strengthened over the years as a result of court decisions. Cite court cases wherever possible.