Environmentally sound technologies (ESTs) are increasingly being promoted internationally, regionally and nationally as potential solutions to environmental challenges such as climate change and pollution, while building resilience and creating opportunities for trade, economic growth and jobs. This report provides an overview of trade in ESTs in the East African Community (EAC) and its drivers and barriers, aiming to support policy makers in knowledge-based decision making, enabling them to harness the opportunities that trade in ESTs offers. It therefore maps the policy landscape related to trade in ESTs and provides a detailed account of trade in five selected ESTs in the East Africa region, with a focus on identifying opportunities and barriers to such trade. The specific ESTs considered in the report are solar photovoltaic (PV) cells, solar water heaters, wind turbines, biomass boilers and hydroelectric technology. While the trade flow analysis focused on these goods, it should be noted that EST goods and services are oftentimes complementary and delivered in a joint manner. Barriers to the trade and diffusion of one therefore also often hampers the deployment of the other. The report also provides an in-depth case study of the national solar PV industry in Kenya, and analyses the main opportunities and barriers to trade and to the diffusion of solar PV products along the domestic value chain.