Do you know what is the ozone layer?
It is made up of 3 oxygen unlike the oxygen that we breathe ( 2 oxygen ). It is formed naturally at the stratosphere of our earth. It protects us from the dangerous UV rays from the sun which can cause skin cancer to humans, destroy crops and kill some marine life too.
This ozone layer sound really nice to humans. However it is actually destructive to us when it is formed at the troposphere where it is nearer to human beings and life on earth. But this ozone layer is not naturally formed, but form from air pollution created by automobile exhaust and emissions from factories and power plants.
This ozone which form unnaturally is called the bad ozone. But why is it bad?