概念酸雨(acid rain)是指PH值小于5.6的雨雪或其他形式的降水。酸雨主要是人为的向大气中排放大量酸性物质造成的,我国的酸雨主要是因大量燃烧含硫量高的煤而形成的,多为硫酸雨,少为硝酸雨,此外,各种机动车排放的尾气也是形成酸雨的重要原因。近年来,我国一些地区已经成为酸雨多发区,酸雨污染的范围和程度已经引起人们的密切关注。 Acid rain is rain and snow with a pH of less than 5.6 or other forms of precipitation. Acid rain is caused mainly by anthropogenic discharge of a large amount of acid into the atmosphere. The acid rain in our country is mainly caused by burning a large amount of coal with high sulfur content, mostly sulfuric acid rain and less nitrate rain. In addition, various motor vehicle emissions The exhaust is also an important reason for the formation of acid rain. In recent years, some areas of our country have become a frequent area of ​​acid rain. The scope and degree of acid rain pollution have drawn people’s close attention.