Introducing WATER SOTNE, an environmental application for teenagers that provides various information and activities on the environment. WATER STONE is a diverse content that matches the teen trend, such as card news, short videos, and postings on recent environmental issues. It is an environmental SNS where you can gather and communicate with peers who are interested in the environment, and you can also access information and activities that are related to environmental advancement/career paths. You can feel a sense of accomplishment by completing eco-friendly activities and even making donations. The more you participate in various activities within the app, the more you can accumulate green coins that can be donated, and you can even experience a fun program where you can get promoted.