<Hello Butterfly> is the fifth illustrated book in the ‘Youth Global Citizenship Education Project’ jointly published by Gwangsan-gu Office of Gwangju and Honam University. The theme is to respond to climate change. The book helps with climate change and environmental policies such as the harmful effects of 'fast fashion' (clothes manufactured and distributed by reflecting the latest trends), desirable clothing consumption methods, zero waste (removal of garbage), and green washing (disguised environmentalism). It contains specific information. The book takes the form of an accordion book that depicts the story through the butterfly's eyes, with the southern yellow butterfly, one of the climate change biomarker species, as the main character.