Hoàn thành câu: Environmental ... is a term that refers to all the ways by which man pollutes his ... Man dirtied the air with ... gases and smoke

5-  complete each space with an appropriate word using the given words. Remember that there are more words than needed 
Environmental(1)...is a term that refers to all the ways by which man pollutes his(2)... Man dirtied the air with(3)...gases and smoke, contaminates water with chemicals and other substances, and(4)...the soil with too many fertilizer and pesticides