Let's investigate air

What we will learn

This is the experiment which investigates the dirt of the air using a bottle and paper.
We did for about two weeks.

Preparations
		・Two empty bottles (inside is washed finely and dry)
		・Two sheets of white paper.
Procedure
		・White paper is put into a bottle.
		One put these bottles on the place ( the house which has a factory in the neighborhood) where air is likely to be dirty. Another was put on the place (door of the house surrounded by the mountain).
Result
		After two weeks, the paper in the collected bottle (left) which was set at the place where air is dirty had yellowed.
		Although it is unclear in a bottle, if paper is taken out, it turns out that upper paper is dirty.
Conclusion
It turned out that the dirt of air changes according to surrounding environment. The color was clearly different when two were compared. It seems that there is no discoloration by sunlight since both were installed in the place where sunlight does not hit. Before experimenting, we thought that there was no difference in air, but more than we thought that it actually experimented, it was surprised that there is a big difference.