The article concerns urban spaces highly responsible for climate change in the country, Europe, and the world. This topic is now of major importance because it reflects on every citizen of Europe and the world in that we all confront the necessity of climate protection and adaptation also in law, to climate change in urban areas. It is associated with a radical change of lifestyle in the world’s cities, mainly in terms of energy consumption and its methods of production. The research results presented in the article indicate the need to adapt current methods for slowing down adverse climate change into functional and spatial systems of urban development and their economic, legal, and social conditions affecting the pace of implementation of new technologies for climate-friendly sources such as low-carbon, energy-saving, and renewable energy. Attention was also paid to the possibility of ecological revitalization of the existing urban structure of buildings, among other things, in order to significantly reduce greenhouse gas emissions adversely affecting the climate. On the other hand, modern ideas for an Eco-City and solutions for a Green-City and Solar-City, presented in the article, implemented through sustainable development in the field of planning activities and energy management methods, can be additional indicators of the direction of sustainable development for Polish cities for climate protection and adaptation to its changes.