Main Emission Sources
The main sources of emissions contributing to acid rain are:
For sulphur dioxide (SO2):
- Base metal smelters
- Fossil-fuelled power plants
- Industrial fossil-fuel combustion sources ( natural gas plants, pulp and paper mills, petroleum refineries, cement plants, upstream oil and gas, etc.)
For nitrous oxide (NOx):
- The transportation sector (automobiles, trucks, off-road engines)
- Fossil-fuelled power plants
- Industrial fossil-fuel combustion sources (natural gas plants, pulp and paper mills, petroleum refineries, cement plants, upstream oil and gas, etc.)