Question

In 1939, the use of DDT (a powerful synthetic chemical) as an insecticide was discovered. The United States adopted its widespread use, producing up to 100 million kilograms per year (200 million pounds per year). Twenty years later, severe side effects started to be reported as a result of DDT use. Which was an advantage of using DDT?

insect and pest populations decreased

birth defect rates increased

cancer rates increased

fertility rates decreased

Answer 1

A. insect and pest populations decreased

Step-by-step explanation:

Answer 2

The answer is insect and pest populations decreased.


DDT (dichlorodiphenyltrichloroethane) was used as an insecticide which is a substance used to kill insects. That resulted in decrease in insect and pest populations. It is a persistent and non-degradable insecticide, but as well organic pollutant readily accumulated to soils and consequently affects organisms.