Question

the case of skin cancer are arising rapidly in comparison to earlier time why

Answer 1

due to UV rays skin cancer is arising

Answer 2

The cases of skin cancer are increasing day by day due to changing situations and rising pollution .Earlier, there was a clean atmosphere which didn't allowed any diseases. Now, There are many kinds of pollutions .The ozone layer is also getting deleted. Because of the above reasons, Skin related diseases are raising rapidly in comparison to earlier time