6.4 Acid deposition

How acid rain is made

sulfur dioxide and nitrogen oxide emitted by cars and factories combine with moisture in the air

SO2 + NO + moister = acid rain

How acid rain damages countries

• Factories from the US cause acid rain to happen in Canda

• Scandinavian and German forests damaged by British coal plants

Liming

The use of limestone in order to balance the pH of water to reverse acid rain. The process is expensive

Ways to stop acid rain

• altering human activity—for example, through reducing use, or using alternatives to, fossil fuels; international agreements and national governments may work to reduce pollutant production through lobbying

• regulating and monitoring the release of pollutants—for example, through the use of scrubbers or catalytic converters that may remove sulfur dioxide and oxides of nitrogen from coal-burning powerplants and cars.