Science. 1987 Jun 19;236(4808):1559-62. doi: 10.1126/science.236.4808.1559.
The composition of precipitation in China is highly influenced by fossil fuel combustion and agricultural and cultural practices. Compared to the eastern United States, precipitation in China generally has higher concentrations of sulfate, ammonium, and calcium. Wet deposition rates of sulfur in China are 7 to 130 times higher than those in a remote area in the Southern Hemisphere. In many areas of the world, significant ecological changes have occurred in ecosystems that have acid deposition rates substantially less than those currently existing in China.
中国降水中的成分受到化石燃料燃烧、农业和文化实践的高度影响。与美国东部相比，中国降水中的硫酸盐、铵和钙浓度通常更高。中国的硫湿沉降速率比南半球偏远地区高 7 到 130 倍。在世界许多地区，具有明显酸性沉降率的生态系统已经发生了重大生态变化，而这些生态系统的酸性沉降率远低于中国目前的水平。
