Question

usage pointed to the pesticide as a cost-effective means of controlling mosquito populations in parts of the world with high malaria rates. still, silent spring ushered in an era of greater awareness, leading people to start thinking more carefully about the environmental impact of chemical products. what is the meaning of ushered as used in the passage? introduced something or brought it about blocked something followed something occurred at the same time as something else

Explanation:

The context shows that Silent Spring led to an era of greater awareness. "Ushered" here implies bringing in or introducing that era.

Answer:

introduced something or brought it about