On the other hand a number of terrorism , global warming and greed became top challenges of today 's world .
On the other hand , terrorism , global warming and greed have become the top challenges of today 's world .
On the other hand , terrorism , global warming and greed have become the top challenges of today 's world .
حدث لإزالة الأخطاء النحوية: On the other hand a number of terrorism , global warming and greed became top challenges of today 's world . خرج: