The Belt and Road Initiative (BRI) is China's effort to enhance inter-regional connectivity through infrastructure, trade, policy, finance, and people. It involves building six economic corridors connecting China to Central and South Asia, Europe, the Middle East, and Africa. The BRI spans over 60 countries containing 39% of the world's land area and over half of global GDP, trade, and CO2 emissions. It presents both opportunities such as green finance and technologies, as well as challenges like environmental degradation. The UN Environment aims to support sustainable development through the BRI by providing guidance, capacity building, and facilitating multi-stakeholder cooperation.