What are the disadvantages of using chemical fertilizers?

What are the disadvantages of hard water?

What are the disadvantages of using dihydrogen as a fuel?

What are the advantages of organic fertilizer?

What are the advantages of biofertilizers over chemical fertilizers? Give an example for biofertilizer.

In terrestrial organisms like birds and reptiles, internal fertilization take place While some aquatic organisms show external fertilisation What is the disadvantage of external fertilization

Monomers of terylene are terephthalic acid and ethylene glycol:- What is the disadvantage of using terylene?

Write one disadvantage of moving coil galvanometer.