We have chosen Europe. The main issues is that one country produce acid rain products that is deposited outside the country borders.
Since wind helps to disperse or diffuse SOx or NOx to other areas , acid pollutants emitted in one country may be deposited as acid rain in other countries. As industrialisation expanded across Europe during the 1970 and 1980s, with the use of tall chimneys in industry and power generation increasing, acid deposition became a significant problem.
Within Europe, emissions of air pollutants vary greatly, depending upon many factors such as size of population ( affects the number of vehicles used), degree of industrialization ( more industrialize community requires more energy consumption which in turn produce more SOx) , pollution control equipment used, agricultural practices, number of road vehicles and political attitudes on environmental issues.
Across Europe the amounts of sulphur dioxide and nitrogen oxides being emitted from a country were found to be different to the amounts of acidic pollution being deposited there. Some countries were emitting only small quantities of pollutants yet deposition was observed to be several times greater, for example in Norway, Sweden, Austria and Switzerland. Other countries such as Bulgaria, Italy, the Czech Republic and the UK emit more pollution than is deposited in their country because of prevailing wind directions.
The deposition or acid rain maybe outside the borders of the country due to dispersion of SOx and NOx particles.