How Europe's 30 Largest Cities Rate for Sustainability

In December 2009, during the United Nations’ 15th Climate Change Conference (COP15), Siemens AG and The Economist Intelligence Unit (a division of The Economist magazine), released the European Green City Index, a rating of the 30 major cities in Europe on environmental sustainability. The study evaluated and scored the 30 cities in eight categories: CO2 emissions, energy, buildings, transportation, water, air quality, waste and land use, and environmental governance.