http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm Fog harvesting http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm http://www.oas.org/dsd/publications/Unit/oea59e/ch12.htm