Living in Canada, I often take clean drinking water for granted. During my many travels to Africa, it became abundantly clear that fresh, clean drinking water was a global problem and I'm happy to see organizations working hard to solve this epidemic.
A team of university researchers have created the Drinkable Book. The book teaches readers about how to purify water and the actual pages turn into usable water filters capable of removing 99.9% of harmful bacteria (cholera, typhoid, E.Coli, etc).
The best part of the solution is that it costs pennies per page (which is far cheaper than most other options). Each filter is usable for 30 days and therefore a single book can provide this life nourishing clean water for 4 years.