A “green” or sustainable meeting “is one designed, organized and implemented in a way that minimizes negative environmental impacts and leaves a positive impact for the host community”, says the Green Meeting Guide, published by the United Nations Environment Programme (UNEP). Environmental impacts caused by various reporting materials, transportation, accommodation, air conditioning and other resources used to host conferences or events include air pollution, greenhouse gas emissions, garbage, and consumption of paper, plastic, food and other resources. Therefore, in order to reduce the environmental impact of conferences and activities, in recent years, all countries around the world have strengthened the advocacy and implementation of the "green meeting". Carbonstop worked with UNEP to develop the green conference guide. In order to promote the concept and practice of green conference more widely, The Carbonstop team also provides development services for the green conference system platform, enabling the green conference to be implemented in more areas.