Australian Science Illustrated — Issue 54 2017

scienceillustrated.com.au | 37

In the Chinese capital of Beijing, the

smog can become so dense that the

only visible sky is on the city’s large

advertising displays.

GETTY IMAGES

Traffic pollutes cities

THE THREE CAUSES OF SMOG:

Coal is the #1 killer

Industry emits hazardous substances

... but efficient particle filters and new cleaner

transport technologies save city motorists.

... and denying this won't change it. Yet while govern-

ments dither, industry moves ahead with better tech.

... but hovering smog purifiers convert the toxic fog

into fertiliser and pure drinking water.

By Niels Hansen