I think that at this juncture the need of the hour is that we try to find solutions rather than pointing out to the paoblems. In other words let us try to be a part of the solutions rather then the problem.

In this context my thinking is that EVs must be made to replace the fossil fuel fired cars ASAP - before it is too late - but at the same time, as has very rightly pointed out by Mr. Alex Hureau, work towards replacing the conventiontional rechargeable batteries by Hydrogen Fuel Cells. In terms of efficiency of producing utility scale electricity from Hydrogen the best in class Hydrogen Fuel Cells can achieve 90% efficiency when operated on pure Hydrogen and 80% with commercial grade Hydrogen. These figures are based on current state of the art and proves that large scale use of this technology is already techno-economically feasible.

Conventional wisdom says that Electrical energy amounting to 140 MJ (38.8 kWh) is currently required to produce 1 kg of Hydrogen and therefore using Hydrogen still requires using the conventional polluting method of its generation.

However, there also is a well established way to obtain Hydrogen from Natural Gas (mostly Methane or CH4). The primary ways in which natural gas, is converted to hydrogen involve reaction with either steam (steam reforming), oxygen (partial oxidation), or both in sequence (autothermal reforming). In practice, gas mixtures containing carbon monoxide, as well as carbon dioxide and unconverted methane, are produced and require further processing. Reaction of carbon monoxide with steam (water-gas shift) over a catalyst produces additional hydrogen and carbon dioxide, and after purification, high-purity hydrogen is recovered. In most cases, carbon dioxide is vented to the atmosphere today, but there are options for capturing it in centralized plants for subsequent sequestration.

For more details one can refer to literature from National Research Council and National Academy of Engineering. 2004.