Common choices are orange or lemon peels, cardamom pods, coriander, licorice and so on.

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Last year, the U.S. Department of Veterans Affairs decided that the link between air-borne dioxin (an ingredient in Agent Orange, and also a common air-borne pollutant emitted by waste incineration, some chemical manufacturing processes, cars and trucks, and other industrial sources that burn fuel) and diabetes was so strong, it compensated 270, 000 veterans for diabetes linked to dioxin exposure.

FORBES: Two New Reasons to Worry about Air Pollution: Obesity and Diabetes

Domestic film producers, like Li Peisen, the chairman of Orange Sky Entertainment, say pleasing censors is common sense and part of doing business in China.

CNN: James Bond's license to kill curtailed in China

If an area like Orange County wants to boost up its Start-up Common, the lessons of Seattle come to mind.

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Big moves at this time of the year are especially common as speculators bet on the likely impact of cold weather on the Florida orange crop.

WSJ: Orange-Juice Futures Leap to Record