Green School 
Little Daejayon in Heungin Elementary School learned the serious pollution of river and what the EM mud ball is.
EM mud ball purifies water which was polluted by domestic sewage, industrial waste water and livestock wastewater etc. Then let’s make it!
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[Daewang Middle School] Watched Daejay.. | Daewang Mi. . | 2011.04.20 |
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[Heungin Elementary School] Learned po.. | Heungin El. . | 2011.04.05 |
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[Daemyeong Middle School] 2011 Orienta.. | Daemyeong . . | 2011.04.04 |
