Identify the segment in the sentence which contains the grammatical error from the given options. If there is no error, mark your answer as ‘No error'.
Agriculture in the United States has become 48 times more toxic to insects over the last 25 years, largely due to a controversy, widely used class of pesticides.
1
Agriculture in the United States has become 48 times more toxic to insects
2
widely used class of pesticides
3
No error
4
over the last 25 years, largely due to a controversy