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coffee is popular among people all over the world to such an extent that the word, a coffee culture,
is coined, but the used coffee grounds are only wastes which are hard to dispose of.
I designed a pen by recycling the used coffee grounds, thinking that they are worth more than the waste materials, and can play a faithful role a green energy source.
Hoseo University
Chungcheongnam-do, South Korea
Hoseo University
Chungcheongnam-do, South Korea
Hye jin,Lee