Who used the term acid rain for the first time?

The term acid rain was first used in 1952 by the English chemist Robert Argus Smith in his monograph. The air and the rain.

The beginning of chemical climatology, acid rain.

He first established a link between rain pH and coal combustion in an industrial center.

After nearly half a century, Norwegian biologist Knut Dahl recognized the relationship between acidity of rainfall and the death of plants and fish in various lakes in his country.