Compared to other types of mining, diamond mining has less adverse impact on the environment. Recovering diamonds from the ore-bearing gravel or kimberlite requires a crushing, washing and screening process to which no chemicals are added. The application of environmental management practices helps protect the air, land and water during the active life of the mine. Modern rehabilitation techniques, aided by the knowledge of traditional land users, enable the restoration of the environmental health and productivity of the area. Detailed site-specific plans are developed in consultation early in project planning and are formulated in accordance with established environmental codes of practice. Plans address soil, vegetation and wildlife issues, air quality, and water and energy conservation. The objective of the EMS is to identify and mitigate impacts during planning and operation, and to leave a productive, self-sustaining and hazard-free post-mining environment.