This book covers the integration of green-gray infrastructure and the development of climate-resilient cities. Climate change and urbanization are the principal global environmental challenges. Up to 70% of the world population is projected to live in cities by 2050. How will this rapid urbanization alter the face of the world? What are the environmental consequences of megacities' expansion? What are smart solutions to make life in cities safe, comfortable and environmentally friendly? These and other important questions are addressed by the conferences Smart and Sustainable Cities (SSC). This year's theme for the conference will be «Green infrastructure and climate resilience». Cities are considered the main sources of anthropogenic greenhouse gases emission. Air and water quality, vegetation and soils in cities are exposed to anthropogenic influence. Studying negative environmental consequences of the anthropogenic and technogenic pressures is among the key tasks of urban ecology and environmental impact assessment. On the contrary, urban green infrastructure provides a wide range of ecosystem functions and services critical to human well-being and urban sustainability under climate change. The following topics are planned for discussion at the conference: green infrastructures for sustainable and healthy cities; climate mitigation, adaptation and carbon neutrality; soil and water management under global changes; advances in environmental monitoring of urban and technogenic ecosystems; biodiversity of urban soils and green infrastructures.