Kenyan teenagers Fredrick Njoroge Kariuki and Miron Onsarigo have won the Africa Earth Prize 2026 for developing HewaSafi, a low-cost vehicle exhaust filter made from readily available materials.

• The prize includes $12,500 to develop and implement the idea.
• The project is led by the two 17-year-old students, from Naivasha and Kisumu respectively.
• HewaSafi, meaning "clean air" in Swahili, utilizes materials like maize cobs, coconut shells, agricultural waste, and algae to reduce harmful emissions from vehicles such as matatus and boda bodas.