They play a key role in introducing and promoting new technologies, facilitating international trade, and can enable efficient use of resources. Innovation and technological progress are keys to discovering lasting solutions to economic and environmental challenges. Investing in research and development is key in less developed countries. SDG No. 11 (Sustainable Cities and Communities). Integral. (Mitigation / adaptation). Rapid urbanization is resulting in increasing numbers of people living in slums, inadequate and overloaded infrastructure and services (such as waste collection and water and sanitation systems, roads and transportation) , which is worsening air pollution and uncontrolled urban growth. SDG No. 12 (Responsible consumption and production). Integral. (Mitigation / adaptation).