11. More recent significant effects of land use include urban sprawl, soil erosion, soil degradation , salinization, and desertification. 12. Operating most machinery in excessively wet conditions may result in soil degradation because of excessive soil compaction. 13. Practicing this style of intensive agriculture with short periods of soil rest leads to soil degradation and desertification. 14. This deforestation has led to soil degradation due to the washing away of topsoil, which has aggravated the process. 15. As soil degradation took hold, it is believed that the marsupials adapted to the more basic flora of Australia. 16. Bio-fuels may be defined as " renewable, " yet may not be " sustainable, " due to soil degradation . 17. Problems with soil degradation have been aggravated by the cultivation of drug crops, leading to deforestation of many areas. 18. Long-lasting impacts include soil degradation by wind erosion and deterioration of grasslands that could take decades and longer to recover. 19. Removal of tree cover was also linked with the development of salinity, soil degradation and erosion, and declining water quality. 20. High temperatures, drought, floods and soil degradation likely will diminish food production in arid, tropical and temperate parts of Asia.
