A discussion about the burning of coal and other fossil fuels and how this can cause acid rain. When acid rain falls into water bodies such as lakes it can cause them to become acidic. This is harmful to fish and other aquatic animals.
At Loch Fleet in Scotland, attempts have been made to reduce the acidity of the water using limestone powder.
Discuss the impurities that are present in fossil fuels and work with students to write up equations that explain the creation of acid rain. Students could investigate the effects of acid rain compared to rain, including how it affects life and the rate of weathering of rocks and building materials. Investigate chemical analysis techniques that are used to monitor environmental quality. Consider how some of the effects of acid rain can be lessened or counteracted. Consider how effective methods to neutralise acid, including the use of limestone shown, are and ask students to work out the equations for reactions involved.