Nanotech tea bag creates safe drinking water, but are there better ways?

tea bag water purification

io9.com has an article on Nanotech sachets that use inexpensive materials (nanofibres and activated carbon particles) in a ‘teabag’ form, to use with individual-sized water bottles. Although it seems like it would be very affordable, I’m not convinced it’s such a good thing, as these disposable teabags only will purify one litre of water, but…

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