What are the effective low-cost and low-energy water purification systems and solutions?

In many cases, industrial and domestic water purification processes have high upfront and operational costs, the latter mainly owing to high energy requirements. What are the sustainable processes and solutions that can purify water at much lower costs, with a lower ecological footprint?

How will it have a positive impact?

Better Human Health

Who will it have a positive impact on?

Rural Community Inc Farmers