SR1.5 FOR CITY ANDURBAN LEADERS
Climate science must be accessible to urban policymakers, because without them, there will be no limiting global warming to 1.5°C. As eighteen of the authors representing all 5 chapters of the Special Report on Global Warming of 1.5°C (SR1.5), we have produced the following Summary for Urban Policymakers to translate the report’s key scientific findings and policy observations for officials and policymakers of the world’s cities and urban areas. Though the SR1.5 primarily speaks to national and international decision-makers, we have produced this synthesis for a simple reason: climate science must be accessible to urban policymakers, because without them, there will be no limiting global warming to 1.5°C. In cities and urban areas, there are actions that policymakers—along with residents and stakeholders, such as civil society, the academic community, and those in business and finance—can take to help limit warming and adapt to the impacts of climate change. The effects of a city’s actions are not limited to its own borders or region, and, likewise, lessons learned in some cities and urban areas can serve as inspiration and resources for solutions in other urban areas. This Summary for Urban Policymakers is synthesised from SR1.5, the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), and relevant supporting research. It builds on thirty years of science from the IPCC and climate diplomacy. The Paris Agreement, signed in 2015 within the United Nations Framework Convention on Climate Change (UNFCCC), committed signatories to maintaining global warming to well below 2.0°C above pre-industrial levels and pursuing efforts to limit this increase to 1.5°C. In 2016, the IPCC accepted an invitation from the UNFCCC to prepare a scientific report on the impacts of global warming of 1.5°C and related pathways to reduce global greenhouse gas emissions. Published in 2018, the resulting report is shifting the global conversation on climate change.