More and more instruments require the internalisation of greenhouse gas emissions costs. Yet, it is very unlikely that a single global price for carbon will prevail. A frequently voiced concern is that states with stringent climate policies will place domestic industries at a disadvantage relative to competitors in states with less ambitious climate efforts. In this chapter, published in the briefing paper "Competitive distortions and leakage in a world of different carbon prices" for the European Parliament, the Ecologic authors Michael Mehling, Nils Meyer-Ohlendorf und Ralph Czarnecki analyse restrictive trade measures to offset the regulatory burden of climate policies, particularly border adjustments, from a legal point of view.