WHAT IS ACID RAIN?

Acid rain is precipitation that is more acidic than normal, with a pH level below 5.6. It is caused by pollution from the fossil fuel industry and vehicle exhaust, which release sulphur dioxide (SO2) and nitrogen oxides (NOX) into the atmosphere. These gases interact with sunlight and water vapor to form sulphuric acid and nitric acid mists, which condense into acidic droplets that fall as rain or snow. Acid rain can harm ecosystems by leaching toxic metals from the soil and preventing trees from taking up water and nutrients. It can also have respiratory health effects on humans. Efforts have been made to reduce acid rain through legislation and the use of air filters and scrubbers in industrial plants. Acid rain can also dissolve monuments and statues made of materials like marble and limestone. The Leshan Giant Buddha in China is being affected by acid rain, leading to erosion and discoloration. China has taken steps to address acid rain, including closing down factories and power plants near the monument. [Extracted from the article]