Usage History of 'polluting'

The following chart shows how frequently 'polluting' appeared in printed materials over time. For example, the word 'polluting' occurred 2 times in books in 1630 and 39,068 times in 2008. From 1630 to 2008, the word 'polluting' was used a total of 874,836 times in books scanned by Google. See Reference: Google Ngram project.

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