BBC: Half of the world's population now lives in cities, and this proportion is set to rise to two-thirds by 2050. Yet cities are particularly vulnerable to the worst impacts of climate change precisely because their locations are fixed.
The latest report by the Intergovernmental Panel on Climate Change (IPCC) re-emphasises the vital role cities can play in cutting greenhouse gas emissions. This should come as no surprise, since urban centres are responsible for three quarters of global energy consumption...