Chemistry can facilitate access to unpolluted water sources -- a challenge that will affect future stability in many regions.

UNESCO: Message by UNESCO Director-General Irina Bokova

The tourists come for the unpolluted beaches or to soak up rural life at one of the small resorts that dot the coastline.

CNN: WHERE IT'S GOOD TO BE OLD

He described a region that contains much of Germany's heavy industry yet the rivers along which factories and mines are sited remained relatively unpolluted.

ECONOMIST: Allen Kneese

That's because the waters to the south and west are among the most unpolluted in the world--ideal for catching not only tuna but also oysters, mussels and lobsters.

FORBES: Magazine Article

In January of this year, a judge in Virginia ruled against the EPA, which had arrogated to itself the power to regulate unpolluted storm water that runs into a creek.

FORBES: The EPA: The Worst of Many Rogue Federal Agencies, Part II

To the middle classes it offers unpolluted air and green space, and though its culinary or cultural life may not be Brazil's most diverse more important for many, several large shopping malls.

ECONOMIST: Brazil: Who says Brasilia doesn��t work? | The