{{cite journal | last1=Ahmed | first1=S. | year=2015 | title=AIR POLLUTION AND ITS IMPACT ON AGRICULTURAL CROPS IN DEVELOPING COUNTRIES – A REVIEW | journal=Journal of Animal and Plant Sciences | volume=25 | issue=3 | pages=20-25 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-602}}