3 million people move to urban areas every week. How will we meet the challenge?

Cities of the future won't just be incredibly populated, they'll also be smarter than ever.

  • Globally we are adding about 3 million people to urban areas each week. Over the course of the year, this number can be equated to roughly 50 Chicagos.
  • This influx of people could make everyday life in urban areas more chaotic than ever. We will need a new playbook for how cities can better handle this massive influx of people.
  • With such population surges, we can use citizen-centric data—computational power—to make the infrastructure of cities run smoother and more efficiently.

Scientists want to use mountains like batteries to store energy

Researchers propose a gravity-based system for long-term energy storage.

Credit: IIASA
  • A new paper outlines using the the Mountain Gravity Energy Storage (or MGES) for long-term energy storage.
  • This approach can be particularly useful in remote, rural and island areas.
  • Gravity and hydropower can make this method a successful storage solution.
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Is Rwanda in line to become one of Africa's major tech hubs?

Recent years have seen countries across the African continent investing deep into the tech industry. Rwanda is angling to get ahead of the pack.

Thierry Falise/LightRocket via Getty Images
  • The recent announcement of the Mara phone, a smartphone manufactured entirely in Africa, has highlighted African countries' recent forays into the high-tech industry.
  • The continent boasts more than 450 tech hubs, and while some countries have a larger market, Rwanda — where Mara phones are manufactured — is angling to become a major tech hotspot in East Africa.
  • There's a lot of competition; what is Rwanda doing to try to beat it?
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'The West' is, in fact, the world's biggest gated community

A review of the global "wall" that divides rich from poor.

Image: TD Architects
  • Trump's border wall is only one puzzle piece of a global picture.
  • Similar anxieties are raising similar border defenses elsewhere.
  • This map shows how, as a result, "the West" is in fact one large gated community.
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These are the countries with the highest inflation

The global inflation rate is currently around 3.6%, but is much higher in these countries

YURI CORTEZ/AFP/Getty Images

The rate of inflation has a big impact on your financial situation, affecting mortgage payments, savings and the cost of your weekly shopping.

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