The Economist suggests that the worries over oil may be misplaced since natural gas could offer an alternative over the long-term:
Until recently, the development of a global gas market has been hindered by one inconvenient fact. Gas is, by definition, gaseous at room temperature; oil is a liquid that can easily be transported. Gas traditionally needed elaborate systems of pipelines to get it from the wellhead to the customer. That meant it was typically used fairly close to where it was produced, shipped at great expense via pipelineor, more often, simply wasted.
The rise of LNG promises to change that. Put simply, gas can be frozen into liquid form near its source, shipped to market in refrigerated tankers, warmed back into gaseous form on foreign shores and injected into the local pipeline system. Thanks to this technological advance, gas has the potential to be a fungible, global commodity like oil.