clean bulletin board by Eun-jee Kim from korea

The goal: Our goal is to reduce a reckless logging for high rate of oxygen and low level of carbon dioxide.
The concept: We can find a lot of abandoned commercial papers on a street. There are a variety of bulletins such as a school, a company, a park and a community. However, A dump of commercial papers, for examples, Internet and Television, are thrown away. So, to reduce the waste of these papers, we suggest a commercial bulletin board.
The composition and the using method: The printer which is able to print on a bulletin fast and directly- we can reduce the use of paper because we don't need papers two times. And we use the ink which becomes clouded after long times. So people can recognize that which one is new or old.