General Knowledgespeaking topic
Ice was once shipped to tropical countries and made men fortunes; ice cut from New England lakes traveled as far as India, and even though half of it melted on the way, the trade still turned a profit. The cold that flows from the tap today was a luxury yesterday. How does abundance zero out a thing's value so fast?
— economic history, the 19th century ice trade
practice with this topic
Set the timer (5-30 min), take 20 seconds of prep if you like, start talking. Jot your thoughts onto the sticky-note board.
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