This book is a training module on Meatless Monday (MM) that serves as a facilitator’s guide in facilitating an interactive, easy-to-understand Meatless Monday training for teenagers and young people. Through this training, participants will gain an in-depth understanding about the Meatless Monday movement, its background and impact, and how it can be implemented in day-to-day life. By reducing our meat consumption one day a week, we can promote a healthy lifestyle and help protect the environment. Let us learn together and contribute to creating a healthy and sustainable lifestyle.