The first issue is birth rates, which according to the Peterson Institute for International Economics (PIIE), have fallen since the collapse of the Soviet Union. Many of these countries are located in or near Eastern Europe, for reasons we’ll discuss below. The following table ranks countries by their rate of population decline, based on projected rate of change between 20 and using data from the United Nations. To shed some light on this somewhat surprising trend, we’ve visualized the top 20 countries by population decline. As of 2019, for example, the average woman in Niger is having over six children in her lifetime.Īt the opposite end of this spectrum are a number of countries that appear to be shrinking from a population perspective. While much of this growth has been concentrated in China and India, researchers expect the next wave of growth to occur in Africa. Since the mid-1900s, the global population has followed a steep upwards trajectory. Visualizing Population Decline by Country With the emergence of smart and green cities, the quality of life for many urban dwellers will likely continue to improve, and more large urban areas will morph into megacities. Convenience, better jobs, easier access to social services, and higher wages are among the many reasons people are likely to continue to move to cities, even in the post-COVID era. While there are certainly downsides to mass urbanization, like pollution and overcrowding, the upsides clearly outweigh the negatives for most people. Since 2012, deaths in the EU have actually been outpacing births-and in 2019, there were 4.7 million deaths compared to 4.2 million births, though net migration kept population numbers from falling. Urban growth will continue mainly in Asia and Africa, as some cities in regions such as Europe actually begin to shrink in population due to aging citizens and declining birth rates. In addition, Guangzhou, Shenzhen, and Chennai are all expected to meet the megacity definition by 2035. Specifically, it’s projected that Bangalore (India) and Lahore (Pakistan) will boot out Tianjin and Buenos Aires. Rankīy 2035, two new cities are expected to crack the top 20 list. Here’s a closer look at the top 20 most populous cities. In fact, it’s expected that Delhi’s population could surpass Tokyo’s by 2028. Indian and Chinese cities, on the other hand, will continue to grow rapidly in the coming years. While Tokyo is the world’s most populous city with 37,393,000 people, this number is leveling out due to declining birth rates and an aging population. Interestingly, Mexico City placed third on the top largest cities list in 2010, but has since experienced slower growth compared to its competitors, Shanghai and São Paulo. Meanwhile, São Paulo grew by more than 2 million, and Mexico City gained just over 1.6 million people. While Tokyo only gained 559,000 people between 20, Delhi gained over 8 million people in the same time frame. How much have the world’s five most populous cities grown in just the last decade? Rank Prospects of better job opportunities and higher wages, along with shifts from agrarian to industrial and service-based economies, are causing mass movement to cities. Rural-to-urban migration is an increasingly relevant trend in the 21st century. Today, more than 80% of people in higher income countries find themselves living in urban areas, and in upper-middle income countries the number lies between 50-80%. This visualization, using data from Macrotrends, shows the 20 most populous cities in the world. This means that the world’s top 20 most populous cities are all megacities. Megacities are defined as urban areas with a population of more than 10 million people. More than half of the world’s population currently lives in cities-and as time goes on, it’s clear that more urban dwellers will find themselves living in megacities. Ranked: The Most Populous Cities in the World
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