One of the main reasons for bad health in third world countries is the lack of freshwater, making the need to purify water increasingly important.
Scientists from South Korea have been working on a method called capacitive deionisation to tackle this problem by desalinating water on a large scale. Capacitive deionisation uses an electric field as a sort of magnet to draw out the anions and cations present in water. You may be familiar with this method on a small scale, using electrodes. Capacitive deionisation is effectively the same method but on a much larger scale - scaling it up by increasing the flow of electrons in the system.
This idea holds great potential and although very simple I think it will be a breakthrough in tackling bad health in undeveloped countries, which really is great.
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