Could Developing-World Cities Make or Break the 1.5c Warming Goal?

With growing slums and emissions - but limited capacity to tackle the problems - these cities are where action will be crucial, experts say

Barcelona - The future that fast-growing cities in South Asia and Africa choose - cleaner and safer, or dirtier and more dangerous - will be pivotal to efforts to limit global warming to 1.5 degrees Celsius, scientists said in a key U.N. report this week.

Iconic metropolises such as New York and London often grab headlines with their plans to cut air pollution, adopt electric transport, design green buildings or protect residents from floods.