Age: At one of those weird, celebrity-laden events they have every few months in New York, Hugh Jackman announced last week “climate change and poverty are inextricably linked”. World leaders furiously nodded their heads in stern agreement. In a basic sense Jackman is right. Rich societies can cope with changes to climate. Poor ones cannot. Subsistence farmers will struggle more with any global warming than accountants in suburban Australia. But for all the talk of climate aid and …