Original Text
And when they have recognized their unrighteousness which they have wrought on the earth, then by these shall they perish.
Simple English
When they realize the wrong they have done on earth, they will be destroyed by these things.
And when they have recognized their unrighteousness which they have wrought on the earth, then by these shall they perish.
When they realize the wrong they have done on earth, they will be destroyed by these things.