In the mid 20th century, whole cities’ sewage systems safely and successfully used fish to treat and purify their water. Waste-fed fish ponds are a low-tech, cheap, and sustainable alternative to deal with our own shit — and to obtain high protein food in the process.
My team has discovered another use for microwave ovens that will surprise you.
What happens when it becomes too costly, unfeasible or, due to sudden disruptions to our energy supplies, impossible, to run our mains sewage system?
Cities of all sizes are built upon sewage systems based on an array of fossil fuel inputs – and the levees are starting to overflow. Time to give this a re-think.