While only about 3% of the world’s land area is covered by urban areas, cities account for around 70% of worldwide CO2 emissions, about two-thirds of global energy demand, and about 80% of global GDP.

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. The world is experiencing a megacity boom. According to the United ...

Delhi is among the thirty-eight of the world’s 100 largest cities, with 'extremely high water stress'. The analysis report ...

Andrew Marr looks at how people live in five of the world's biggest megacities: London, Dhaka, Tokyo, Mexico City and Shanghai. Andrew Marr takes a look at safety and security, two of the biggest ...