2SO2 + O2 – 2SO3 2NO + O2 – 2NO2 SO3 + H2O – H2SO4 NO2 + H2O – HNO2 + NHO3 The pH of natural rain water is near about 5.
6 but the presence of H2SO4 and HNO3 lowers down its pH.
Acid rain is an extremely destructive form of pollution, and the environment suffers from its effects. Forests, trees, lakes, animals and plants suffer from acid rain. Trees are extremely important natural resource. They provide timber, regulate local climate, and forests are homes to wildlife. Acid rain can make trees lose their leaves or needles. The needles and leaves of the trees turn brown and fall off.
Trees can also suffer from stunted growth; and have damaged bark and leaves, which makes them vulnerable to weather, disease, and insects. Lakes are also damaged by acid rain.
Architecture and artwork can be destroyed by acid rain.
Acid particles can land on buildings, causing corrosion. When sulfur pollutants fall of the surfaces of buildings (especially those made out of sandstone or limestone), they react with the minerals in the stone to form a powdery substance that can be washed away by rain. This powdery substance is called gypsum. Acid rain can damage buildings, stained glass, railroad lines, airplanes, cars, steel bridges, and underground pipes.
Humans can become seriously ill, and can even die from the effects of acid rain. One of the major problems that acid rain can cause in a human being is respiratory problems. Many can find it difficult to breathe, especially people who have asthma. Asthma, alongwith dry cough, headaches and throat irritations can be caused by the sulfur dioxides and nitrogen oxides from acid rain.
Acid rain can be absorbed by both plants (through soil and/or direct contact) and animals (from things they eat and/or direct contact). When humans eat these plants or animals, the toxins inside of their meals can affect them. Brain damage, kidney problems, and Alzheimer’s disease has been linked to people eating “toxic” animals/plants.