* Land planning and design techniques should preserve the natural environment and minimize disturbance of the land

* Site development should be planned to reduce erosion, minimize paved surfaces and runoff, and protect vegetation, especially trees

* Water conservation, indoors and outdoors, is a prime concern

* Energy efficient heating and cooling systems, appliances and lighting are mandatory

* Large south-facing windows to harness the sun's energy in winter and to reduce energy costs

* Blocking the summer heat with special overhanging covering and large concrete deck to improve cooling efficiency