At the 2015 UN Climate Change Conference in Paris, nations around the world reached a landmark agreement to unify in an effort to combat climate change. The main goal of the Paris agreement is to strengthen the global response to the threat of climate change by keeping global temperature rise well below 2°C above pre-industrial levels and preferably to limit the temperature rise even further to 1.5°C. However, global commitments to the Paris Agreement goal of 1.5 degrees have proven insufficient. Most actors in our society realise the need for action, and it is cities that will play a special role. Our cities must lead in the soc-cultural, economic, and technological transformations to meet the 1.5 degree goal. Remember, the global urban population is expected to double by 2050. This report examines examples of where the transition has already begun, and analyzes the opportunities facing cities in climate change mitigation. It highlights the key concepts in supporting integration of sustainability practices in urban climate governance, the role of urban planning, energy efficiency and energy sufficiency and the influence of urban planning for e.g. urban sprawls and liveability.