The LEED Certification System consists of which main categories?
1) Tract Housing and Apartments (TH⁺A)
2) Neighborhood Development (ND)
3) Mining, Industrial, and Chemical (MI+C)
4) Building Design and Construction (BD+C)
5) Big Box Retail and Strip Malls (BB+S)
6) Operations and Maintenance (O+M)
7) Homes (Homes)
8) Interior Design and Construction (ID+C)