"New Technology and Regulations for Pollution Control: Water Quality Edition (2025) - For Qualification Training of Pollution Control Managers, etc." Pollution Control Technology and Regulations Editorial Committee Price: 11,000 yen (tax included) This is a 3-volume set for the 2025 fiscal year. I only read it a little, so it's mostly unused, but there are signs of use, minor scratches, and stains. There are no markings. I will remove the sticky notes before sending. Please understand that this is a used item. I am also selling several reference books related to Pollution Control Manager (Water Quality)."