Graphic Illustrator: Carol Rollo

Urban humans: Cities go up, down and high-tech to combat rising threats

From space shortages to worsening climate change, cities are being forced to adapt at a pace never experienced before. How far can they push their limits?

Urban humans | Series Trailer

From space shortages to worsening climate change, cities are being forced to adapt at a pace never experienced before. How far can they push their limits, and make sure they leave no one behind?

Can Dubai go green with flying taxis and 'rooms on wheels'?

From Singapore to Berlin, cities have been looking at new transport technologies to cut traffic and climate-warming emissions. Could flying taxis in Dubai be a solution?

Ssssh: As cities surge, some seek a new aim - peace and quiet

Cities around the world are purposefully slowing down and quietening urban life, with an eye on improving health and well-being

Crowded Hong Kong goes underground to overcome land crunch

From Singapore to sub-Saharan Africa, cities are fast running out of space - Hong Kong's solution is to move more facilities underground

Guns or yoga? City crime fighters in South Africa and Colombia

A growing number of cities are using CCTV systems and forensic tools to tackle crime, raising concerns that privacy is being lost while criminals target poorer areas with less surveillance

Future cool: Minnesota city ponders new boom as a climate migrant destination

A Minnesota town is among a group of cities that scientists predict will become top destinations for Americans abandoning parts of the country due to climate change

Mars shows man the final frontier of circular economy

Scientists say the Red Planet could show mankind how to reuse resources and preserve life on Earth

'Symbolic rent': Seattle residents pay reparations to Native American tribe

Hundreds of people in Seattle are making voluntary monthly rent payments to the indigenous Duwamish tribe, to make up for historical unpaid reparations