1 / 5   The Coconut School, located at the Kirirom national park in Kampong Speu Province, Cambodia, is built mostly from recycled waste such as used tires, plastic bottles, old sneakers and bottle caps. It offers classes to teach kids the value of reducing waste, with donations supported by volunteer and teachers. /VCG Photo

2 / 5   Most of that waste comes from the students' contribution as they used the trash to pay for their school fees. The facility is a brainchild of Ouk Vanday who's nicknamed "Rubbish Man," a former hotel manager who dreams of a trash-free Cambodia. /VCG Photo

3 / 5   “I use rubbish to educate children by turning garbage into classrooms... so the children will understand the value of using rubbish in a useful way,” Arab News reported the 34-year-old as saying. /VCG Photo

4 / 5   Vanday only opened the school a year and a half ago, and he plans to expand classes in more poor regions. He's optimistic the young minds are future environmental ambassadors in the making. /VCG Photo

5 / 5   “We hope they’ll become new activists in Cambodia, understanding the use, management and recycling of waste,” Vanday told AFP. /VCG Photo