Video: You can now add lemons to the long list of random objects that can be used to start a fire. But unlike just generating friction and heat by rubbing two sticks together, the process of starting a fire using a piece of citrus fruit involves first turning it into a working battery with copper and zinc electrodes. The odds are slim you'll randomly find everything you need for this potential life-saving trick if you end up stranded in the woods, but understanding the science behind how it works is still just as useful.
When Life Gives You Lemons, Here's How To Use Them To Make Fire
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