Which of the following is mainly responsible for damaging the ozone layer ?

Which of the following is mainly responsible for depetion of ozone layer?

Which one of the following is mainly responsible for depletion of ozone layer ?

Which of the following is responsible for depletion of the ozone layer layer in the upper strata of the atomosphere

Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?