The question of whether fossil fuel will be replaced is not so much relevant as when fossil fuel will be replaced. Research findings, and even layman knowledge makes it clear that one day, the world will run out of fossil fuel and depend on alternative sources of energy, which means it is a question of when this will happen (Milbrandt, 2011). However, the difficult question is not about replacement but about finding the best replacement. With a bountiful of alternative source of energy, there has not been any one that has completely replaced fossil fuel. However, considering the pattern of use of fossil fuel, hydrogen seems a perfect alternative to replace fossil fuel. According to Pruss, Wheeler and McCord (2006) today, fossil fuel account for more than 80% of energy supply in the world. This is in the backdrop of knowledge that fossil fuel is a nonrenewable source and the realty will come when all sources are depleted. It is accepted that the world’s carbon reserve cannot match the current usage and in a matter of time, the supply will dwindle. Apart of from depletion, fossil fuel has had a toll on the environment. Rise of carbon atmospheric concentration has contributed to climate change. The current change of in carbon concentration is 200 times more than the world had experienced in the last 500,000 years. These and others are reasons why the world should be moving towards replacing fossil fuel with environmental friendly and renewable source of energy. Hydrogen is a possible replacement to fossil fuel. Looking at the current research, there have been promising findings that shows how hydrogen can be a perfect replacement for fossil fuel.