Here is the John Todd website both Tamara and I were referring to in class the other day. As a quick intro, John Todd is a highly accomplished academic with degrees in ecological design, parasitology, agriculture, science and engineering. Through his work as Professor at the School of Natural Resources at the University of Vermont, he has developed programs and Eco-machines, which employ the ecological knowledge to address urgent human and environmental problems. One of these urgent items is the treatment of contaminated water and John Todd has devised Eco-Machines to do just that.
Here is the link: