Climate change doesn't just cause ecological disasters. A new book by one of our correspondents shows how it is also behind some of the world's nastiest conflicts
In 2007, I flew to Chad and drove east to the 21st century's first war over water. Darfur, a barren, mountainous land just below the Sahara in western Sudan, is one of the world's worst man-made disasters. Four years of fighting has killed 200,000 people and made refugees of 2.5 million more. The immediate cause is well known: the Arab supremacist janjaweed and their backers in the Sudanese government are waging a campaign...