You might think that cow dung smells bad, but that must be because you have never mixed it with coconut water and let it distill for seven days to remove all the impurities. This is what two students competing in Indonesia's Science Project Olympiad did, and they ended up with a nice-smelling, eco-friendly, chemical-free cow dung air freshener. The high school girls, Dwi Nailul Izzah and Rintya Aprianti Miki, did such a good job that they actually beat out 1,000 other student inventors to win the competition.
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