5.12 Understand that nitrogen oxides and sulfur dioxide are pollutant gases which contribute to acid rain, and describe the problems caused by acid rain

NO (nitrogen oxide) is produced in car engines.

When nitrogen oxide and sulfur dioxide are in the atmosphere they react with rainwater to create H+ ions, making it more acidic. This means that when rain falls it can alter the PH in soil or rivers which will severely affect the ecosystem. It can also corrode limestone, damaging rocks, buildings (a big problem if the buildings are historical ones)