An Australian ski-resort is recycling black-water (sewage) into artificial snow:
Waste from resort is converted into usable water in two ways, both at a recycling plant for initial treatment, and then separately through a three-step purifying process of UV light filtration, ozonation and ultra-filtration. The final ultra-filtration step removes all suspended solids from the liquid including all biological matter, alive or dead. The resulting water is even free of viruses, bacteria and spores from cryptosporidium or giardia. The treated wastewater is then used in conjunction with meltwater and creekwater from surrounding areas to create snow.
(via /.)
