Due to this fact, many research groups around the world work on biological hydrogen production.Nowadays, it is important to develop renewable and clean energy sources for the future.
It is obvious that fossil fuels (i.e., petroleum, natural gas and coal) while being rapidly depleted meet most of the world’s energy demand today.
Their utilization, however, causes global warming, climate change, ozone layer depletion, acid rain, and pollution, all of which are pose great dangers for the environment of our planet Earth.
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