Natural gas prices are on the climb and this climb is about to intensify in the first months of the new year as seasonal demand hits its peak in the northern hemisphere. That’s bad news for struggling economies. Gas prices in Europe, Asia, and North America have made solid gains this year. Reuters’ Gavin Maguire reported this week those fall in the range between 30% and 50%--and that’s not the end of the rally. Winter is just beginning, and the weather in Europe and Asia, as well as most of North America, is about to get a lot…