This is the free study of summer vacation! Let's go to "Sewerage Exhibition '19 Yokohama"!

　We will exhibit a Yokohama booth at "Sewerage Exhibition '19 Yokohama" hosted by the Japan Sewerage Association. The Sewer Exhibition is the industry's largest exhibition introducing the latest technologies and equipment related to sewerage, and is held every year in various places in Yokohama City for the first time in 11 years. The Annex Hall, which is exhibited by Yokohama City, introduces sewerage and environmental improvement initiatives for elementary school students in an easy-to-understand manner.
　The Yokohama booth is full of content that touches the sewer while having fun, such as a craft corner and a photography corner, and preparations for heavy rain and earthquakes. The quiz rally participants will also receive a wonderful novelty!
　Everyone who is having trouble with the theme of free research during summer vacation! Why don't you take the theme of the underground "sewer world" that is not usually visible this year? ？