Answer
Fuel cells are not only cost-effective, but also environmentally friendly. They are designed to emit no air pollutants. The hydrogen-oxygen fuel cell, for instance, produce only water as waste product. These cells, however, are not widely used because they are too expensive for general use.
Work Step by Step
Fuel cells are not only cost-effective, but also environmentally friendly. They are designed to emit no air pollutants. The hydrogen-oxygen fuel cell, for instance, produce only water as waste product. These cells, however, are not widely used because they are too expensive for general use.
