Medellín in Colombia was experiencing a severe urban heat island effect. Now, new green growth is bringing temperatures down dramatically.

Asphalt contributes to the urban heat island effect and makes places more prone to flooding. Planners are rethinking its place in cities.

A disused Sainsbury’s supermarket in Portsmouth, England, has been transformed into an indoor skatepark.

Low-emission zones in big cities such as London reduce air pollution, especially for poorer communities.

Redesigning Denmark’s busiest train station to make it safer for those on foot or bike took note of how people moved about in the snow.

From dumpsite to baby shower venue: green spaces are sprouting up within Nairobi’s many landfills.

The Spanish city of Pontevedra banned cars decades before most cities started to think about reclaiming streets for pedestrians.