The report highlights the collaborative action already happening between cities, states, regions, business, and national government, using data reported by over 1000 cities, states and regions through the CDP-ICLEI Unified Reporting System. Immediate action is needed to stop global greenhouse gas emissions, avoid new emissions, design resilient infrastructure and switch to renewable energy. Cities, states and regions – especially those reporting through the CDP-ICLEI Unified Reporting System – are a critical part of this new path forward. They must help halve global emissions by 2030, and set science-based climate targets to stay on the pathway of a 1.5°C temperature rise. 93% of cities are already at risk – they must put plans in place to adapt to the impacts of climate change, underpinned by a climate risk and vulnerability assessment (CRVA).