Millions of people around the world are wearing green to celebrate St. Patrick’s Day today. Some interesting facts on the color:
- Green is associated with St. Patrick’s Day because it is the color of spring, Ireland and the shamrock
- Green ink originally was used in U.S. currency to prevent counterfeiting and because of its resistance to chemical and physical changes
The Chicago River is colored green for the St. Patrick’s Day parade each year using 45 pounds of vegetable dye
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