I was at friends the other day, we were having a campfire. He took something out and buried it in the fire. It almost immediately changed the fire from yellow and orange to blue and green flames? Turns out he put some cut lengths of a typical garden hose into a copper pipe. I was skeptical about the reaction being safe to breath. Does anyone care to give a guess as to the chemical reaction taking place? By the way, the next morning, the copper pipe was left but the hose was consumed.
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