Find the part that is not grammatically correct.

1.) In English these questions have formed by changing the word order of a statement , whereas in some languages the word order remains the same

2.) particular issues that concern teenagers were covered in the two hours programme.

3.) Air ppllution caused by industrial fumes has been studied for years, but only recentry has the harmful effects of noise pollution became known.

ช่วยเฉลยอย่างละเอียดให้หน่อยนะครับ ช่วยทีนะฮะ please !!

ขอขอบพระคุณผู้มีเมตตากรุณาทิคุณทุกท่านนะฮะ ขอบคุณฮะ