Introduction:
Hydrogen (H 2 ) can be produced from fossil fuels (such as coal), nuclear power or renewable resources, such as hydropower
Importance of hydrogen:
Advantages:
● can be produced from several sources, reducing dependence on petroleum
● no air pollutants or greenhouse gases when used in fuel cells
● it produces only NO x when burned in internal combustion engines.
Disadvantages:
● expensive to produce and is only available at a few locations
● fuel cell vehicles are currently too expensive for most consumers
● hydrogen has a lower energy density than conventional petroleum fuels, so it is difficult to store enough hydrogen on a vehicle to travel more than 200 miles.