Australian Broadcasting Corporation: MARK COLVIN: There was Black Friday in 1939, Ash Wednesday in 1983, and now this. Some climatologists are already seeing it as an accelerating pattern of bushfire activity, made worse by global warming. Stephan Faris, who’s visiting Australia for the Perth Writers Festival, is an international journalist who’s written a book called “Forecast” about the future effects of climate change on politics, immigration, water sharing and international conflict. He believes the …