This booklet by the Trade and Environment Division of the World Trade Organization (WTO) aims at improving understanding of the role of trade and trade rules with regards to environmental issues. It seeks to answer, in easyto- understand terms, some of the key questions of the trade and environment debate as they relate to the multilateral trading system. In this sense, it is not an exhaustive analysis of the issues covered, but rather an attempt to provide basic information and examples to answer some common questions raised about trade and the environment.