Q.The pH of normal rain water is

Acid rain is rainfall with pH below the natural baseline of 5.6 (itself set by dissolved atmospheric CO2 forming carbonic acid). It results when sulphur dioxide and nitrogen oxides released by burning fossil fuels are oxidised and react with atmospheric water to form sulphuric acid and nitric acid, which then settle as wet deposition (dissolved in rain, fog or snow) or dry deposition (particulates settling directly on surfaces). Acid rain washes away nutrients needed by plants and crops, causes respiratory illness in humans and animals, harms aquatic ecosystems through run-off, corrodes water pipes and leaches heavy metals such as lead and coppe …