Historic perspective of environmental pollution

Rainwater is acidic due to atmospheric CO2, SO2 and nitrogen oxides its pH is typically 

The issue of chemical emissions and their effect on the environment is not limited to recent history. As shown below, acid rain was first documented in the 1600s. The chronology below lists some important events in the identification, monitoring, and steps to reduce emissions for acid rain and global warming [9]. 

Swedish scientist C. V. Linne describes a 500-year-old smelter at Falun, Sweden ... we felt a strong smell of sulfur... rising to the west of the city... a poisonous, pungent sulphur smoke, poisoning the air wide around... corroding the earth so that no herbs can grow around it.  

English scientist Robert Angus Smith coins the term acid-rain in a book called Air and Rain The Beginnings of a Chemical Climatology. Smith is the first to 

1911 English scientists C. Crowther and H.G. Ruston demonstrate that acidity of precipitation decreases the further one moves from the center of Leeds, England. They associate these levels of acidity with coal combustion at factories in Leeds. 

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