The green is what I thought was money, but maybe not
Hot Money: Radioactive Cash Stolen
November 8, 2004 Lithuanian officials have warned the country's 3.5 million citizens to be on the lookout for a missing radioactive US $100 bank note.
Officials in the former Soviet state say they do not know how the note became radioactive, but one theory is that it could have come from somewhere in eastern Europe that still has a high level of post-Chernobyl contamination.
It was discovered in September when it set off alarms at an airport checkpoint and was quarantined in a safe room.
But the bank note was reported missing - probably stolen - on Tuesday just before it was due to be destroyed.
The chief of Lithuania's radioactive substances security agency, Albinas Mastauskas, said the note was not potent enough to cause burns, but it could pose long-term health risks for children or pregnant women.
Yes, I can't think of anything, right off the bat, other than money. Alot of countries, other than the U.S., have different colors for different denominations of money. At least European countries did prior to the Euro and I'm not sure of the color(s) of the Euro. America, compared to (some) others, all denominations are green.
kyrptonite is green