The highest electromagnetic radiation reading it found was a seventh of the internationally agreed safe limit.
And according to the Planetary Boundaries concept, the nitrogen cycle is already one of the places where humanity has already broken through the "safe limit".
The test found that it contained nearly 4, 000 micrograms per litre of carbon tetrachloride - nearly 1, 000 times the World Health Organisation's safe limit.
By boosting productivity, the Internet can lift the economy's safe speed limit before inflation starts to rise.
It only takes one can to exceed the government's daily recommended safe alcohol limit of three to four units for men and two to three units for women.
Some Fed officials would have preferred to move faster, but Alan Greenspan, the Fed's chairman, has been more sympathetic to the idea that the faster productivity growth of the new economy has significantly increased the economy's safe speed limit.
This scenario has worked to limit safe-haven demand for gold this week.
FORBES: A.M. Kitco Metals Roundup: Comex Gold Firmer on Bargain Hunting
However, there are clues that safe-haven investor demand continues to limit the downside in gold.
FORBES: A.M. Kitco Metals Roundup: Gold Trading Near Steady but Bearish Outside Markets Limit Upside
The world market place is quieter to start the new trading week, which did limit the upside for the safe-haven gold market.
The U.S. debt limit debacle is bullish for the safe-haven precious metals and especially gold.
FORBES: Comex Gold Ends Weaker on Mild Profit Taking, But Bargain Hunting Limits Losses
Still, the U.S. debt limit debacle is bullish for the safe-haven precious metals and especially gold.
FORBES: Comex Gold Firmer, Silver Weaker as Mild Profit-Taking Sets In
This tactic doesn't just let parents keep Web browsing safe and open, it also helps parents limit the time kids spend online and encourages offline activities like sports or socializing.
The U.S. debt limit debacle and the simmering European Union debt crisis continue to produce safe-haven investment demand for the precious metals.
FORBES: Comex Gold, Silver End Higher as Gold Sets Another New Record High
For a start, David Cameron promised that the benefit was safe for the life of this parliament, and campaigning to abolish or even limit it is hardly a vote winner.
Silver, meanwhile, is likely to stay range-bound as it is does not have the safe-haven allure gold does, plus it could find additional weight from a slowing global economy which would limit the industrial use of the metal.
FORBES: Gold Prices Could Rally Next Week If Dollar Gains Fizzle
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