Non-renewable nature and environmental pollution toward the climatic changes are some disadvantages of fossil fuels (oil, natural gas and coal).
Hydrogen as a zero-emission fuel is a good solution to avoid the pollution. Ability of production of hydrogen fuel from the most available renewable energy, solar power (power to electrolyze) is a major encouraging point.
Trapping the countries in prize controlling authorities (OPEC) is another important reason to turn the hydrogen fuel.
However, risk of storage and handling is a major issue to be addressed when hydrogen is used as a fuel for general use.
I would like to discuss the ability of current technology for the production/use hydrogen (as a alternative for fossil fuel) for general needs.
Simply say, yes, of-course. Risk of storage and handle is more or less the same as in case of all gases that we use as fuel. Do not forget that hydrogen is zero emission fuel on site of consuming. This would have a sense if also production of hydrogen were under zero emission. There also possibility how to produce it with renewable energy as you said. It only depends how effective this process is and how big its capacity is. Maybe we can use electricity directly instead of converting it in case of solar power and so on. We must calculate also emission which is needed for production of this energy sources and their lifetime (e.g. solar panels). And we also must calculate energy or emission which is necessary for compression and storage of hydrogen. So maybe hydrogen production and transportation which make sense from economic and environmental point of view is cardinal task. If we had it, there are technologies how to hydrogen can be used for heat or electricity or both.
Unfortunately, "economic" and "environmental" are variables that are under development in this task. For example, if environment were the most important, it would't be matter how expensive it is. If money right now were the most important, it would't be matter how dirty it is or how big problem it brings in future. It is strongly depending on politics and sometimes facts and natural sense are not the most important factors in decision procedures.
Thank you Roman Fiala and Emmanuel Vijayanand Murray for you comments.
I am also thinking about demand and supply.
Further, I would like to draw your attention about the media release given below;
"Germany Moves Into Hydrogen With Lessons From OPEC and Russia"
available at
https://finance.yahoo.com/news/germany-moves-hydrogen-lessons-opec-050021172.html
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