Roberta Olenick via Getty Images
A young inventor has a cleanup plan -- but he has to understand the enormity first.
ALY SONG / REUTERS
'As far as we know, the color of the river is today no different from normal.'
Aly Song / Reuters
When you think of cleaning a city’s dirty drinking water, it’s easy to imagine using giant plants or some tiny new portable technology. But one of the most effective ways to provide cleaner drinking w...
BEIJING — More than 80 percent of the water from underground wells used by farms, factories and households acro the heavily populated plains of China is unfit for drinking or bathing because of conta...