The purpose of sustainable
design is to eliminate negative impact on the environment through sensitive, skillful
design. Sustainable design has minimal impact on the environment, requires no non-renewable resources, and relates people with nature. Sustainable design requires forethought in site selection, home building plans, material selection, and project implementation. Some of the considerations to be taken into account include choosing non-toxic materials which are sustainably produced or recycled, and require minimal energy to process; using materials which are longer lasting and of higher durability, to reduce the impact of producing replacements; designing for reuse and recycling; and designing systems on biological lines, to enable the reuse of materials in continuous closed cycles. The basic idea is to create healthy homes, which are not harmful to the occupants or the larger environment.