The process of replanting and rebuilding soil in areas that have been environmentally degraded. Revegetation can occur as natural plant colonization and succession; or it can be artificially accelerated to repair soil damage due to wildfire, mining, floods or other causes. Originally, the process simply involved applying seed and fertilizer to disturbed lands, usually grasses or clover. The fibrous root network of grasses is useful for short-term erosion control, particularly on sloping areas. Establishing long-term plant communities requires the establishment of woody plants. There are now other various processes that can be used in revegetation.