According to the Textbook, When Did Many People Become Alerted

Multiple Choice

According to the textbook, when did many people become alerted to the fact that technological advances may not always be beneficial?

A) when hydroelectric power began to cause mass pollution
B) when the atom bomb was dropped on Hiroshima, Japan, in 1945
C) when the environmental movement broadened to the mass pubic
D) when global warming became a well-known issue worldwide