A few years back there was a lot if work being done reclaiming polluted land with mushrooms. There was even literature published about remediation of nuclear waste polluted land, battlefields. There were scientists in Africa having good results with petrochemical spills and they were doing their work on a shoestring budget so that it would be workable pretty much anywhere. Its worth looking into if you have all that going on. I know Paul Stamets over here did a lot, and knows a lot on the subject. It might be worth looking him up.
Interesting.