This environmental outreach guidebook was developed as part of an environmental outreach training program. This Environmental Outreach Training was conducted in response to the increasingly apparent and serious environmental crisis in Aceh, including in South Aceh and the surrounding areas, which are directly linked to the Leuser Ecosystem. As one of the world’s most important tropical rainforest areas, the Leuser Ecosystem not only supports ecological life but also provides a source of water, food, and disaster protection for millions of Acehnese. Damage to this area has a direct impact on people’s daily lives.