Pesticides and fertilizers can help farmers to produce more crops. However, overuse of these chemicals can result in
1 2 3 4
ecological succession material recycling environmental pollution selective breeding
Question: Pesticides and fertilizers can help farmers to produce more crops. However, overuse of these chemicals can result in
(1) ecological succession
(2) material recycling
(3) environmental pollution
(4) selective breeding

Answer: (3) environmental pollution
Answer: (4) selective breeding
Question: Pesticides and fertilizers can help farmers to produce more crops. However, overuse of these chemicals can result in
(1) ecological succession
(2) material recycling
(3) environmental pollution
(4) selective breeding
Answer: (3) environmental pollution