Sydney Morning Herald: Not long ago, I was diagnosed with a new type of mental illness. So were you. It happened at the TED conference in Sydney, a festival of ideas where white people try to save the world with their laptops. A philosopher there said we were all at risk for what he called ”solastalgia”, ”the sense of sadness provoked by environmental change”. Climate change was resulting in a new kind of melancholy, he said. He had previously diagnosed solastalgia in a woman who had an open-cut coalmine put …