This report considers the implications of the Kyoto Protocol on competitiveness and addresses the WTO-compatibility of measures to offset competitive losses. From the outset the Kyoto Protocol and the United Nations Framework Convention on Climate Change have had to contend with perceived tension between effective action to slow climate change and maintenance of competitiveness. This report explores the nature of the concerns over competitiveness, trying to dissect them in a meaningful way and assess the need for concern. It employs a definition of competitiveness that applies as between firms, as opposed to any general notion of the competitiveness of nations.