The sun triggers the release of smog-forming nitrogen oxide compounds from urban grime. Continue reading →
A massive explosion at a warehouse in the northern Chinese port city of Tianjin killed seven people and sent a fireball ripping through the sky. Continue reading →
Right now, there are 28 mega-cities in the world, with about 450 million inhabitants among them. So, which world cities make the cut?
An international team of researchers has figured out which cities squander the most resources, and which are the most efficient.
Pollution and the urban heat island effect may cause slightly more thunder and lightning than rural areas get. Continue reading →
So much heat is emitted by air conditioning units in Phoenix it actually raises the city's outdoor temperature at night. Continue reading →
The Chines government is removing the tops of 700 mountains to create 155 square miles of free space to build cities. Continue reading →
Expanding cities can swallow biodiversity hotspots and other important protected natural areas.
+ Load More