A reference book fully compatible with the 2025 exams, containing the past five years' worth of questions. - Title: National Examination for Pollution Control Manager, etc. Correct Answers and Hints - Edition: 2020-2024 - Compatible Year: Fully compatible with the 2025 exams - Contents: Includes past 5 years' worth of questions - Author: Water Quality, Types 1-4 Thank you for viewing. Purchased in early August 2025. No writing inside. Up-to-date as of the time of listing. Thank you.