The WRI's Measurement and Performance Tracking (MAPT) initiative aims to assist major emerging economies in designing and implementing domestic measurement systems for greenhouse gas (GHG) reporting in preparation for international regulations. By collaborating with various stakeholders, the initiative will leverage existing methodologies to facilitate policy-neutral accounting and enhance the transparency of GHG reductions. Target countries include Brazil, India, South Africa, and Colombia, which are involved in developing specific plans and tools for effective GHG performance tracking.