Rue des Tournelles, Paris, November 5, 2019. Four Voi scooters wait hopefully for potential clients, with a Lime and Dott sprawling nearby. Behind them, a Velib’ rider has made his choice.
Leighton Kille/The Conversation France
In major cities around the world, dockless scooters and bikes are everywhere, yet the companies themselves are often breathtakingly short-lived. Basic economic concepts give us clues why.
Achieving the American dream.
4 PM production/Shutterstock.com
As more people of color move to the suburbs, they might not find the full range of opportunities that white European ethnic groups did for most of the previous century.
Shanghai from above (left) and on the ground (right) – a public toilet in a market hall.
Deljana Iossifova
Hundreds of Canadian municipalities have declared climate emergencies but many have yet to take action.
Chilean police clash with anti-government demonstrators during a protest in Santiago, Chile, Nov. 12, 2019. Santiago is one of a dozen cities worldwide to see mass unrest in recent months.
AP Photo/Esteban Felix
Most of the world's urban residents now live in suburban areas. A multi-year, multi-site project has conducted research internationally about these changing urban areas.
A study looked at fines in 93 California cities. Cities with more black residents and more disproportionately white police forces tended to rely the most on fines.
Would that it were so simple.
Olivier Le Moal/Shutterstock.
Planes, trains and automobiles produced a step-change in the speed of travel – driverless and electric cars simply cannot deliver such radical improvements.
From happier and healthier residents to more resilient buildings – green roofs offer significant benefits to cities.
Severe air pollution can speed up neurodegeneration when the brain is at the peak of its development — during childhood. Pictured here, a child in Beijing.
(Shutterstock)
Investigation of the brains of children and young adults who died suddenly in Mexico City revealed amyloid plaques similar to those found in the brains of people with Alzheimer's disease.