Cuba's iconic revolutionary Fidel Castro warned that the world was on an "inexorable" march into the abyss this year because of climate change and the threat of nuclear war. In an article published Thursday -- Castro's first since November 2011 -- the 85-year-old retired leader also took aim at the United States and at gas shale "fracking," a new source of fossil fuels condemned by environmentalists. He did not, however, address rumors of his death, which were denied by an official Cuban blogger after they surfaced on Twitter earlier this week. "Many dangers threaten us, but two of them, nuclear...
