Cities over the twenty-first century.

Most demographers and planners project that more and more people will continue moving to cities over the twenty-first century. While there is worry and fear that many of the "cities of the future" will be increasingly crowded and dirty, there is also a movement to design cities that, if done well, can become the linchpin of sustainability and human health.

Read this article to get one glimpse at this vision: https://www.architecturaldigest.com/story/climate-change-design-urban-planning
What are the key factors, according to this article, for developing cities that will reduce carbon emissions, combat climate change, and facilitate human thriving?

Do you believe this vision is possible for all cities, including the mega-cities of the developing world - such as in sub-Saharan Africa - that are anticipated to show huge amounts of population growth over the next few decades?