Sustainable design implies making design decisions that could result in less impact on environmental resources. Green infrastructure systems are appropriate for a wide range of landscape project types in place of, or in addition to, the traditional storm-water management infrastructure. Low impact development (LID) applies a diverse range of designed topographic, landscape, and infrastructure features that mimic how natural landscape systems manage storm water, keeping the water as close to its source as possible. In urban areas animal habitat can be of two types: natural habitat set aside and protected or created habitats reconstructed to simulate the physical characteristics to support specific animals. The extra dollar of cost in adding plants will have a greater increase in economic value to a project than does the increase in project costs by adding architectural elements. Well-landscaped neighborhoods and homes tend to sell more quickly and at a higher price than similarly laid out neighborhoods and building architecture but without a well-designed landscape.