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- Researchers: Jaeger Sulistio, Michael Wijaya, Ilinca Hadi, and Ellyonora Tiawarman
- Level/Campus: Primary 4 - Semarang
- Abstract: This project explores the use of spent coffee grounds as an eco-friendly fertilizer, aligning with SDG goals 3 (Good Health and Well-being) and 13 (Climate Action). As one of the world's largest coffee producers, Indonesia generates significant coffee waste, which can be repurposed to enhance soil health. The experiment compared plant growth with and without coffee fertilizer over four weeks, showing improved growth in treated plants. Materials used include coffee grounds and eggshells. This natural fertilizer is simple to use—mix into soil weekly—making it a sustainable alternative to reduce waste and support greener agricultural practices.
- Coach: Ms Hana Vetriana