By 2050, climate change impacts such as storms and drought could displace up to 300 million people worldwide. Nations should recognize 'climate migrants' and make plans for aiding and resettling them.
Too much emphasis on environmental stress overlooks the role of politics and economics.
The global tropical climate zone is expanding. At the current rate, by 2100 its edge will stretch from Sydney to Perth.
Migration is an important issue but not one that can be 'solved' through climate policy.