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 →
Food on the go was an integral part of daily life in the empire, generally enjoyed with wine, gambling or even prostitutes. Continue reading →
Solar powered waste management stations will soon offer high-throughput wireless signals on street level. Continue reading →
In the future, neighborhoods could be recycling their own water, just like they recycle newspapers, bottles and cans.
Scientists, engineers and planners are figuring out new ways of speeding up supply chains, delivery and getting rid of waste.
In theory, cities could make a little go a long way for a large number of people. In practice, many cities can be extremely wasteful.
Right now, there are 28 mega-cities in the world, with about 450 million inhabitants among them. So, which world cities make the cut?
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