Q: Swiss researchers last year detected 3 tons of silver and 95 pounds of gold in effluent and sludge from nation’s sewage treatment plants – amounting to about $3.1 million. Where is Switzerland?

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Second question (of five)

Q: The researchers reported it wasn’t cost effective for the wealthy nation to try to extract the precious metals from the sewage. What tiny nation on Switzerland’s eastern border tops the CIA’s list as having world’s wealthiest population?

A. Liechtenstein

B. Luxembourg

C. Monaco

D. San Marino