Climate change is a pressing global environmental issue. The fight against climate change is of great urgency. Under the United Nations Environment Programme (UNEP), the “Climate Youth Network” is Hong Kong’s first school climate network. "Climate Youth Network" recruits secondary school students to become "Climate Youth Ambassadors". Through a series of training schemes, activities, experiences and practices, secondary school students are trained to become climate leaders. Starting from individual practices to mobilising school and community members to join the low carbon lifestyle, students are able to combat climate change together.