I am an architecture student, currently looking at a post industrial site where soil has been severely effected by cyanide ( due to gold mining process ). I would like to explore the possibilities of permaculture methods, and bioremediation methods , through using plants etc, to help neutralize the cyanide, or to make it inert. To return nutrients to the soil, so that it can eventually be used to grow crops again in the future. Does anybody know of any plants which would be suited to this type of process? or if it is possible at all? Are there any natural methods which can be used for such a purpose? The site itself is dry, semi-desert , very little rainfall and low humidity. It is in southern spain. The water levels have dropped due to intense agriculture in surrounding areas. It is a mountainous region, though the cyanide dumps are in valleys. The area has been left for about 60 years, the government recently tried to cover up the area by placing 1metre of topsoil over most of the area. This has not proven to be very successful, although there are a few dwarfed palm trees growing on the area..... any information that i can use to solve this problem would be immensely appreciated. I am very interested in learning more on such subjects. Any information, useful links and such would be very much appreciated?