Guardian: It is billed as the largest ever gathering of climate change deniers, a convention that kicked off last night with a title suggesting global warming is a thing of the past, and a guest list that includes a hurricane forecaster, a retired astronaut and a sitting European president. Entitled Global Warming: Was It Ever Really a Crisis? and featuring some of the most prominent naysayers in the climate change debate, this week’s conference in New York sets out to escalate its …