We advise clients on how to measure and improve sustainability performance. We often work through our flagship knowledge product, the Global Green Economy Index™ (GGEI), a leading global tracking of 160 countries and how they perform on 18 indicators linked to climate change & social equity, sector decarbonization, markets & ESG investment and environmental health. We work with governments, international organizations, NGOs, and private firms on consulting assignments, as well as a sub-contractor to larger consulting firms and projects.