The answer is A. It is true, acid rain is normally caused by the combination of sulphur dioxide and nitrogen oxide which are by products of burning fossil fuels. This is normally due to industrial air pollution. Places that are normally highly affected with acid rain, are places that are industrialized, e.g. China and Russia. Burning fossil fuels is a major cause of acid rain. Some activities such as electricity generation, factories and motor vehicle production are primary causes of acid rain.It is good to note that volcanic eruption is a natural phenomenon that causes a concentrated acid rain.
