"Ecology Note – Towards Clean and Beautiful Capital City – is a supplementary material for primary school teachers who wish to introduce environmental education for the first time, or for those who want to enhance the scope of educational work in addition to what is already taught in the classrooms. The scope of environmental education is wide, including various environmental issues from climate change, bio-diversity, pollution of air, land, water, sustainable management of waste and finite resources including those exhaustible and renewable. In this note, waste/resource management and climate change issues are given special attention as environmental issues most close to students and most pressing to Phnom Penh Capital City."