Bug-killing book pages clean murky drinking water - BBC News

08-15-2015

BBC News

bbcnews

Image copyright WATERISLIFE/Kristine Bender Image caption The next stage is to test the books in larger trials where they are used by local residents

A book with pages that can be torn out to filter drinking water has proved effective in its first field trials.

Why Social Progress Matters

04-08-2015

Michael Porter

CAMBRIDGE - Economic growth has lifted hundreds of millions of people out of poverty and improved the lives of many more over the last half-century. Yet it is increasingly evident that a model of human development based on economic progress alone is incomplete.

Report: Ozone Layer on Road to Recovery

09-09-2014

VOA

Lisa Schlein

GENEVA - The World Meteorological Organization reports the earth'€s protective ozone layer is on track to recovery by the middle of the century. The agency says the so-called Montreal Protocol, which calls for the phase out of ozone-depleting substances is working.

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