potentially solid buildup, and that may result system clogging and system failure. The evidence in pollutant removal proved the conclusion of the previous study that the annual pollutant runoff from the driveways was 86% lower for pervious driveways than impervious driveways. Types of Pervious pavement include: Porous asphalt Advantage: Relatively low cost; Easy access to the material; Workers are experienced with it Disadvantage: Susceptible to water damage; Usually used for short-term only; Low relative strength Pervious concrete Advantage: High structural strength; Easy access to the material Disadvantage: Slow construction process; High initial cost Permeable interlocking concrete paver Advantage: Ease of Construction, Aesthetics, Ease of maintenance and repair Disadvantage: High Cost; Only can be used for low speed road way Grid pavement Advantage: Wide variety of products; Relatively inexpensive; Ease of maintenance and repair Disadvantage: Typically limited to parking areas The decision among different permeable pavement types depends on the need of the project, available material and equipment, and budget. Effective and smart lighting Site lighting with full cut off fixtures, light level sensors, and high efficiency fixtures. Structure orientation Sun rises from East, moves toward South, and sets in the West. Thus, a rule of thumb for design is to avoid south-facing window when trying to decrease cooling load of the building and increase south-facing window when trying to decrease heating load of the building. The reality, however, is more complicated. Sun rises from East and sets in West perfectly only on the autumnal and vernal equinoxes, and during the vast majority of the year, Sun travels slightly southward and eastward depending on whether it is summer or winter and on whether the observer is in Northern Hemisphere or Southern Hemisphere. To design for the best performance of the site, the designer needs to well understand the local climate and the site's location relative to equator. More to include Energy-efficient landscaping techniques include using local materials, on-site composting and chipping to reduce green waste hauling, hand tools instead of gasoline-powered, and also may involve using drought-resistant plantings in arid areas, buying stock from local growers to avoid energy in transportation, and similar techniques. Example In agreement with the city to build a resilient and sustainable landscape, Massachusetts Institute of Technology has initiated several energy efficiency upgrade projects, these projects include: Planting trees and using the tree canopy to provide shade for pedestrians, which also would give students more incentive to