Two of the main obstacles associated with hydrogen fuel cell technology in automobiles are and

Two of the main obstacles associated with hydrogen fuel cell technology in automobiles are: (1) lack of an efficient and cost-effective distribution of the hydrogen fuel and (2) inadequate supply of hydrogen. Currently, hydrogen fuel is being distributed by hydrogen-refueling stations. However, these are very costly to build and not many are willing to invest in it. Also, generating hydrogen is costly and energy intensive, thus, the supply might not meet the demand once hydrogen fuel becomes the mainstream in automobiles.  

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.