News Report

Intermediate level

Water filter book

Episode 150817 / 17 Aug 2015

Step 1: Listen

You're going to hear a genuine BBC news report. Before you listen, read these three summaries.

a) The new book shows you how to purify water by adding copper and silver


b) The new book's pages are contaminated with copper and silver nanoparticles.

c) The new book's pages are used as filters which can clean dirty water.

Now listen and decide which one is correct. Listen again if you need to.

Step 2: Learn the key words and listen again

How was that? Try listening again. Here are four definitions of key vocabulary items which may help you.

to make something clean and pure by removing harmful or dirty substances

doubling as
having a second use as

if something is impregnated with something else, it has absorbed it (here: the pages have absorbed the copper and silver nanoparticles)

made dirty or harmful by adding another substance

Step 3: Transcript and answer

Still not sure? This time you can read the transcript. The answer's underneath.

Researchers in the United States have designed an instruction book on how to purify water, with the pages themselves doubling as water filters.

Tests show that when ripped out, the pages, which are impregnated with copper or silver nanoparticles, killed almost all of the bacteria counts in contaminated water.


c) The new book's pages are used as filters which can clean dirty water.

This bulletin comes from BBC World Service Radio.


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