From intellectual property rights and bio-prospecting to the conservation of biodiversity to transboundary pollution to the eco-labelling of food, the trade and the environment are inexorably linked. Increasingly, the jurisprudence of the General Agreement on Tariffs and Trade (GATT) and its successor the World Trade Organization (WTO) is exerting a powerful influence on both international and domestic environmental law and by extension the environment itself. This handbook, authored by five world leaders on international environmental and trade law at the Center for International Environmental Law (CIEL), is an accessible, comprehensive, one-of-a-kind compendium of environment and trade jurisprudence. Providing an overview for both experts and non-experts of the major themes relevant to environment and trade, it also analyses how these themes have been treated under GATT and the WTO.