Bug-killing book pages clean murky drinking water effectively on first field trials.
plus links from "More on this story" on that page to other innovative ways of filtering water, or getting water in unusual ways:-
www.bbc.co.uk/news/world-africa-32973591
www.bbc.co.uk/news/technology-23360907
www.bbc.co.uk/news/business-13895077
www.bbc.co.uk/news/world-africa-11156031
www.bbc.co.uk/news/science-environment-21899227
and on from one of them to:-
www.bbc.co.uk/news/technology-20465982
Sorry about all the links to follow.
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