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very good website stating facts and how the process of cleaning water would be effective in Africa and other developing countries.

With 3.575 million people dying each year from water-related disease, our current water crisis is one of epic proportions. At any given time, half of the world's hospital beds are occupied by those suffering from illness brought on by limited access to safe drinking water, poor hygiene and sanitation. This is why these examples of devices used to purify drinking water are so critical to help the developing world.

This gives information regarding what turbidity is and how it can be filtered out of water.

This explains how ammonia can be filtered out of water and what materials can be used to do so.

An example of a filtration system in use

Potentially could help with identifying magnetic or chemical ways of filtration

The way Lifestraws clean out bacteria and viruses

Focuses on Membrane filters

An example of a filter

A simple way to make a purification system

More on simple purification systems