Cities striving for carbon neutrality recognize that averting the worst impacts of climate change will require cutting GHG emissions by at least 80% by 2050. Because urban areas account for nearly three-quarters of humanity’s emissions, reaching this goal will depend in large part on our ability to reimagine and reinvent cities in ways that promote economic prosperity, social equity, enhanced quality of life, and climate resilience. The Carbon Neutral Cities Alliance (CNCA or “Alliance”) aims to address what it will take for leading international cities to achieve these deep emissions reductions, and how these cities can work together to meet their respective goals more efficiently and effectively.