Future population growth is expected to take place almost entirely in cities. We won't fight climate change without them.
Lee: 'Business will be far from usual in a world of four, five or six degrees of warming.'
Green and cool (reflective) roofs are effective tools for cooling overheated cities. Research in Chicago shows that their impacts depend on local conditions, so planners should site them carefully.
Despite the fanfare of signing the Paris Agreement on climate, little progress has been made on compensating poor countries for irreparable damages from climate change.
The Paris Agreement marks an important step towards climate change mitigation – one in which developed and developing countries alike take action.