The H2SO4 in the air gets washed down whenever it rains, generating “acid rain”, a phenomenon which has been rising rapidly for the past 20 years or so. Acid rain has linked not only to damaged trees and there plants, increased weathering and corrosion of materials and buildings, and water pollution problems, but also is possibly an added threat to human health. Acid rain is also formed from NO emissions, which can react to form nitric acid (HNO3) in the atmosphere. Recently, acid rain was declared as possibly “the most severe environmental problem of the century"
參考答案:不是机翻哦……
空气中的硫酸在降雨时溶于雨水中，形成酸雨，一种20年来迅速形成的气候现象。酸雨不但损害树木植被，腐蚀原料和建筑，造成水污染问题，还可能成为人类健康的新的威胁。酸雨另一个成因是一氧化氮的排放，这会促成大气中硝酸的形成。最近，酸雨被称为可能是“本世纪最严重的环境问题”。