To what extent are there trade impediments to the transfer and adoption of environmental goods and services? How can these be addressed by global trade negotiations? What is the role of complementary measures in order to ensure "win-win" benefits -- that is promoting both environmental protection and economic growth? And how can developing countries also benefit to ensure a triple -- "win-win-win" -- situation? This book addresses these questions. A key conclusion of the research is the need for policy settings to address both supply and demand-side factors. Indeed supply-side factors, including a diverse and cumulative range of trade barriers are more significant inhibitors of the deployment of technology and service-based solutions to global environmental challenges than has been assumed heretofore. As a new round of services trade negotiations gathers momentum at the World Trade Organisation, and efforts continue to launch a broader WTO Round encompassing tariff negotiations, it is hoped this volume makes a timely contribution to debate on how trade liberalisation can yield concrete results on the journey to sustainable development.