Problem :
Flint river has to much lead.
Biomimicry Idea:
Mimic the mushroom’s way of filtering water. the mushroom has a underground part called mycelium. The mycelium breaks down pollutants like E. coli. Could we make water filters based on mushrooms? We could put them on water hoses on farming fields, scatter them on lakes that struggle with E.coli outbreaks and even think about using these mushroom filters to help our local schools filter out lead in their drinking water.
http://www.popsci.com/article/science/mushrooms-are-helping-purify-dirty-waters