What do you meant by acid rain

When Fossil Fuels Are Burnt They Produce Harmful Gases Like Nitrogen Dioxide, Sulphur Dioxide Which Dissolve In The Air And Form Harmful Acids Like Nitric Acid And Sulphurous Acid. Then This Acid Rains Down In The Form Of Acid Rain, Which Causes A Number Of Disease and Problems.
 

Acid rain is a rain or any other form of precipitation that is a unusually Acidic, meaning that possesses elevated levels of hydrogen ion. It can have effect on plant aquatic animals and infrastructure. Acidic rain is caused by emission of Sulphur dioxide and nitrogen oxide which reacts with water molecules in the atmosphere to produce acid. Nitrogen oxides can be produced naturally by lightning strikes and Sulphur dioxide is produced by volcanic eruption. The chemicals in acid rain can cause paint to feel corrosion of steel structures such as bridges and erosion of stone statues

Acid rain is the rain caused by pollutants such as Nitric acid gets mixed with atmospheric vapours, a rain cloud is produced that has its acidic level lower than that of normal rain,i.e., 1 or 2 pH as compared to 5.6 pH level and it also causes harmful skin diseases for humans such as skin cancer, rashes and many diseases in plants. Acidic rain, when mixed with water bodies and streams, rivers severely affect the marine animals and can even cause their death.