1. Acid Deposition Acid deposition involves the deposition of bothwetanddryacidic components

2. Definitions

Wet deposition (acid rain) rain or any other form of precipitation the is acidic.Clean or unpolluted precipitation has a ph of around 5.2; anything below this can be considered acidic.

Dry deposition acidified particles and gases which are deposited directly from the air.

3. Why do we get acid deposition?

The primary causes are the emissions of sulphur dioxides and nitrogen oxides into the atmosphere

These emissions lead to direct dry deposition or react in the air to produce sulphuric and nitric acids (acid rain)

These emissions come from power generation, vehicles and factories

Other sources include wildfires and volcanoes

4. 5. 6. Impacts of Acid Rain

Acid rain can impact;

Surface water (rivers, lakes etc.) and aquatic animals

Soils

Forests and vegetation

Human health

Building and the urban environment

7. A Trans-national Problem

The impact of acid deposition is therefore focused on areas with high levels of industrial and other pollutants Western Europe and the USA for example.

Increasingly acid deposition will be a problem in rapidly developing areas such as China

Scandinavia has been badly affected by acid rain why?

8. Management Options

These include;

Technological fix

International treaties

Emissions trading

9. You should;

Make notes on the link between pollution and the acid deposition that results (a flow diagram perhaps)

Research examples and case studies of the impacts of acid rain (e.g. Scandinavia)

Research and evaluate the strategies used to manage the problem; show an awareness of the trans-national nature of acid rain