RE: Adv doc set 2 Q46
Good questions, Chikk!
“while” is used to show simultaneity of events. It is also used to show contrast. In the context while is used to emphasize the contrast.
Industrialization and modern methods of insect control have improved the standard of living …. while at the same time introducing some 100,000 dangerous chemical pollutants that have ….
Refer to OG13, Q134 to explore the use of “while”
Dolly