What is a Megacity?
In 1800, less than 10% of people lived in urban areas. Today, more than 4.3 billion people or 55% of the world’s population live in urban settings.
Mass migration from rural areas to urban centers gives rise to megacities—cities housing more than 10 million people, which are often the centers of economic activity in a given country. New York and Tokyo were the first to be recognized as megacities in the 1950s. Today, there are 32 megacities across the globe, and this number is set to grow.
The above graphic uses data from UN World Urbanization Prospects (2018) to map cities that are projected to turn into megacities by 2030.
The World’s Next Megacities
In most high-income countries including the U.S., Canada, Japan, Australia, and those in the Middle East, over 80% of the population live in urban areas. By contrast, in many low-income countries, the majority still live in rural settings, and the potential for urbanization remains high.
Therefore, many of the up-and-coming megacities are in developing countries.
|City||Country||2022 Population||2030P Population||% Increase From 2022|
|Seoul||South Korea 🇰🇷||9,975,709||10,163,000||1.90%|
|Ho Chi Minh City||Vietnam 🇻🇳||9,077,158||11,054,000||21.80%|
|Dar es Salaam||Tanzania 🇹🇿||7,404,689||10,789,000||45.70%|
The fastest-growing cities—Dar es Salaam and Luanda—are both in Sub-Saharan Africa. Luanda is the capital city of Angola and among the 10 wealthiest cities in Africa. Dar es Salaam is the largest city and financial hub of Tanzania, and by 2100, it’s projected to be the third-most populous city globally.
Furthermore, five of the nine projected megacities are located in Asia.
Chengdu, located in Southwestern China, has been an attractive destination for foreign investment. As of 2020, 305 of the world’s 500 largest companies had operations in the city. Ho Chi Minh City (HCMC) is the fastest-growing Asian city on the list. In 2019, HCMC accounted for roughly 23% of Vietnam’s gross domestic product (GDP), highlighting its position as the main commercial hub.
Upon comparing the per capita GDPs of the countries listed above, London and Seoul are the two outliers, located in the wealthiest countries.
|Country||GDP per capita (2020, current US$)|
|South Korea 🇰🇷||$31,631.5|
Source: World Bank
Both South Korea and the UK have a higher GDP per capita than the rest of the countries combined, and more than 80% of their population live in urban areas. Therefore, it’s unsurprising that Seoul and London have the lowest growth rates among projected megacities. By contrast, cities in Angola and Tanzania—the two lowest-income countries—are projected to grow by over 35% from 2022 to 2030.
The Urbanization Megatrend
The global urban population has been climbing for decades, while the rural population has started stagnating.
In 2007, the number of people living in urban areas eclipsed that of rural areas, and the gap is expected to widen. The UN projects that by 2050, 68% of the world will live in urban areas. Only a few countries are expected to have more people living in rural areas than urban settings, mainly in Sub-Saharan Africa and Asia.
Where will the new megacities beyond 2030 be?
Mapped: Countries With the Highest Flood Risk
Recent floods in Pakistan have affected more than 33 million people. Where is the risk of flooding highest around the world?
Risk of Flooding Mapped Around the World
Devastating floods across Pakistan this summer have resulted in more than 1,400 lives lost and one-third of the country being under water.
This raises the question: which nations and their populations are the most vulnerable to the risk of flooding around the world?
Using data from a recent study published in Nature, this graphic maps flood risk around the world, highlighting the 1.81 billion people directly exposed to 1-in-100 year floods. The methodology takes into account potential risks from both inland and coastal flooding.
Asian Countries Most at Risk from Rising Water Levels
Not surprisingly, countries with considerable coastlines, river systems, and flatlands find themselves with high percentages of their population at risk.
The Netherlands and Bangladesh are the only two nations in the world to have more than half of their population at risk due to flooding, at 59% and 58%, respectively. Vietnam (46%), Egypt (41%), and Myanmar (40%) round out the rest of the top five nations.
Besides the Netherlands, only two other European nations are in the top 20 nations by percentage of population at risk, Austria (18th at 29%) and Albania (20th at 28%).
|Rank||Country||Flood risk, by population exposed (%)||Total population exposed|
|#12||🇸🇸 South Sudan||32.5%||5,437,000|
|#15||🇨🇬 Republic of the Congo||29.3%||1,170,000|
The Southeast Asia region alone makes up more than two-thirds of the global population exposed to flooding risk at 1.24 billion people.
China and India account for 395 million and 390 million people, respectively, with both nations at the top in terms of the absolute number of people at risk of rising water levels. The rest of the top five countries by total population at risk are Bangladesh (94 million people at risk), Indonesia (76 million people at risk), and Pakistan (72 million people at risk).
How Flooding is Already Affecting Countries Like Pakistan
While forecasted climate and natural disasters can often take years to manifest, flooding affected more than 100 million people in 2021. Recent summer floods in Pakistan have continued the trend in 2022.
With 31% of its population (72 million people) at risk of flooding, Pakistan is particularly vulnerable to floods.
In 2010, floods in Pakistan were estimated to have affected more than 18 million people. The recent floods, which started in June, are estimated to have affected more than 33 million people as more than one-third of the country is submerged underwater.
The Cost of Floods Today and in the Future
Although the rising human toll is by far the biggest concern that floods present, they also bring with them massive economic costs. Last year, droughts, floods, and storms caused economic losses totaling $224.2 billion worldwide, nearly doubling the 2001-2020 annual average of $117.8 billion.
A recent report forecasted that water risk (caused by droughts, floods, and storms) could eat up $5.6 trillion of global GDP by 2050, with floods projected to account for 36% of these direct losses.
As both human and economic losses caused by floods continue to mount, nations around the world will need to focus on preventative infrastructure and restorative solutions for ecosystems and communities already affected and most at risk of flooding.
Mapped: Energy Consumption Per Capita Around the World
Which countries use the most energy per person?
Mapping Global Energy Consumption Per Capita
In the four decades since 1980, global energy consumption doubled from 77 trillion kilowatt-hours (kWh) to nearly 155 trillion kWh.
But despite soaring energy demand from emerging economies, energy consumption per person only grew by around 14%.
So, which countries consume the most energy per capita today?
The above infographic maps global per capita energy consumption in 2020 using data from Our World in Data. Energy consumption includes electricity, transport, and heating.
The Energy Consumption Leaderboard
The top 10 countries by energy consumption per capita are relatively wealthy and heavily industrialized.
|Country||Year of data||Energy consumption per capita (kWh)|
|Trinidad and Tobago||2020||123,800|
|United Arab Emirates||2020||117,686|
|United States Virgin Islands||2019||95,010|
|Saint Pierre and Miquelon||2019||64,130|
|European Union (27)||2020||34,772|
|Antigua and Barbuda||2019||31,385|
|Turks and Caicos Islands||2019||25,775|
|British Virgin Islands||2019||23,486|
|Saint Kitts and Nevis||2019||21,074|
|Bosnia and Herzegovina||2019||21,068|
|Saint Vincent and the Grenadines||2019||8,154|
|Sao Tome and Principe||2019||3,412|
|Papua New Guinea||2019||3,316|
|Democratic Republic of Congo||2019||403|
|Central African Republic||2019||328|
Iceland tops the list and is also the leading generator of electricity per capita. Thanks to the country’s abundance of geothermal resources, geothermal and hydropower plants account for more than 99% of Iceland’s electricity generation.
Many of the top 10 countries are large energy producers or industry-heavy economies. For example, Saudi Arabia, Canada, Kuwait, Norway, and Qatar are among the world’s 15 largest oil-producing countries. Similarly, Trinidad and Tobago is the largest oil and gas producer in the Caribbean and is one of the largest exporters of ammonia globally.
The presence of energy-intensive industries like oil and gas extraction is likely a major factor influencing total and per-person energy use in these countries.
Why is Tiny Iceland So Big on Energy Use?
Why does Iceland use so much energy per person?
Let’s take a look at Iceland’s colossal industrial energy consumption, to see where energy goes:
|Sector / Industry||2019 energy consumption* (thousand kWh)||% of total|
|Aluminum foil industry||473,723||2.5%|
*Energy consumption excludes losses.
Source: Orkustofnunn – National Energy Authority of Iceland
Iceland’s three Aluminum smelters—Alcoa, Rio Tinto Alcan, and Century Aluminum—consume more energy than all other sectors combined, and account for 30% of the country’s carbon dioxide emissions. Iceland isn’t particularly rich in bauxite (the raw material used to make aluminum), but cheap and clean electricity are big incentives for aluminum smelters to set up operations on the island.
For similar reasons, Iceland is also a popular destination for data centers and bitcoin mining. The year-round cool climate lowers cooling costs for thousands of computers running around the clock, and clean grid electricity minimizes their carbon footprint.
Overall, it’s not surprising that the residential sector is among the smaller consumers of energy, despite the importance of home heating in a cool climate. Iceland’s industries, especially aluminum smelting, make up the bulk of its energy use, pushing the overall per-person use above all other countries.
The Bottom 10 Countries
Countries at the bottom end of the list are among the world’s least-developed economies, with relatively lower GDP per capita numbers.
|Country||2019 Energy consumption per capita (kWh)||GDP per capita (2020, current US$)|
|Democratic Republic of Congo||403||$544.0|
|Central African Republic||328||$492.8|
These countries consumed significantly less energy per capita compared to the global average of 19,836 kWh. In a stark contrast to the countries topping the list, their per capita GDPs are all lower than $1,000.
As economies develop, villages get electrified, megacities emerge, and industries grow, leading to higher overall energy consumption. On a global scale, if economic growth continues, energy consumption per capita is likely to continue its steady increase.
The latest news from our sponsors:
Electrification12 months ago
Ranked: The Top 10 EV Battery Manufacturers
Real Assets2 years ago
Visualizing China’s Dominance in Rare Earth Metals
Misc2 years ago
All the World’s Metals and Minerals in One Visualization
Real Assets2 years ago
What is a Commodity Super Cycle?
Real Assets2 years ago
How the World’s Top Gold Mining Stocks Performed in 2020
Misc12 months ago
All the Metals We Mined in One Visualization
Real Assets11 months ago
The World’s Top 10 Gold Mining Companies
Real Assets2 years ago
Visualizing the Life Cycle of a Mineral Discovery