While a small portion of the SO 2 and NO X that cause acid rain … These particles will have a pH level below 5.6. Normal unpolluted rain usually has a pH-value of 5-5.5, while distilled water is pH-neutral and has a pH-value of 7. It can be harmful to animals and plants and the environment in general. Acid rain is also called acid deposition because this term includes other forms of acidic precipitation (such as snow). Acid rain is one of the major environmental threats since 19th century. These gases combine with the oxygen and water in the air. The corrosion is mainly caused by moisture and oxygen, although sulfur dioxide accelerates the … Acid rain has been around for a very long time, it is as old as the very first time that we have released ammonium, carbon, nitrogen, and sulfur into the atmosphere. Rotting vegetation and erupting volcanoes release some chemicals that can cause acid rain, but most acid rain is a product of human activities. Precipitation comes in the form of rain, snow, sleet, or hail. Ratnashri Dutta Feb 24, 2020 . The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as electricity generation, factories, and motor vehicles. Its pH should be 7. The acid dissolvesit. Rain was the cause of the weather forecasts on the radio. The acid deposits rob the soil of essential nutrients such as calcium and cause aluminum to be released in the soil, which makes it hard for trees to take up water. People became aware with the negative effect of pollution in 1600s. When the water in the air comes down as rain, sleet, hail, or snow, it carries with it these gases. 2021 National Geographic Partners, LLC. International cooperation to address air pollution and acid deposition began with the 1972 United Nations Conference on the Human Environment in Stockholm, Sweden. If it is very pure. List of the most important Acid Rain Facts & Stats Acid rain can be defined as rain with a pH-value of around 4.0.-4.2. Normal rain is slightly acidic, with a pH of 5.6, while acid rain generally has a pH between 4.2 and 4.4. Acid rain runs off the land and ends up in streams, lakes and marshes - the rain also falls directly on these areas. Acid rain occurs because the rain contains the elevated hydrogen ion level. The following equations show the … Facts about Congo Rainforest present the interesting information about the rainforest in Congo which spans around the Congo River. One study found that acid rain in China may have even contributed to a deadly 2009 landslide. When coal and petroleum are burned in automobiles, electric power plants, and factories, they release certain harmful gases into the air. Facts about Acid Rain 9: pH. Acid raid can come naturally because of the burning coal, volcanic eruption and rotting plant life. Fossil fuels release the nitrous oxides (NOX) and sulfur dioxides (SO2). Find out facts about acetic acid here. Facts About Acid Rain You Must Know. Acid rain, precipitation possessing a pH of about 5.2 or below mainly produced from the emission of sulfur dioxide (SO2) and nitrogen oxides (the combination of NO and NO2). Here are some facts about acid rain. Thus, the lower the pH-value, the higher the acidity level. Interesting Facts About Acid Rain 1) Acid rain is formed when the air humidity is combined with oxides of nitrogen, sulfur dioxide or sulfur trioxide emitted by factories, power plants, heating boilers and vehicles that burn coal or products derived from Oil containing sulfur. In the U.S., the Clean Air Act of 1990 targeted acid rain, putting in place pollution limits that helped cut sulfur dioxide emissions 88 percent between 1990 and 2017. 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