Although carbon emissions factors from electricity generation vary according to their net calorific values and efficiencies, natural gas with about 400 gCO2 per kWh is clearly the lowest of the fossil fuels. For those concerned with the need to move to a low carbon future, and quickly - especially those who have negative views about nuclear power - natural gas would appear to be the obvious bridge to that low carbon future as far as electricity generation is concerned, with a reliance on renewable energy, and avoidance of the potentially catastrophic consequences of human-induced climatic change. However, it scarcely touches the transportation sector. In this short Note I suggest, without going into the challenges of a renewable energy future or the uncertainties and complexities surrounding the subject of climatic change (topics I intend to cover in a talk at the ESCP Europe Paris Campus on May 31st), that the natural gas sector faces its own severe challenges. These challenges largely come about due to the internal contradictions and unforeseen consequences of energy policies in all too many countries.