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concept
Is it marvelous color of the umbrella is changing?
Do you think changing color is beautiful?
You should know it. It is focusing on changing color of umbrella because of acid rain from
polluted air.
The litmus umbrella shows different color according to intensity of acid rain.
People concentrate on changing color of umbrella and recognize how air pollution is serious.
We designed this umbrella to help reduce air pollution.
seoul national university of tech
seoul, South Korea
sang-hoon Lee
you-ho Jeon
seoul national university of tech
seoul, South Korea
sang-hoon Lee you-ho Jeon yong-bum Lim
