The awareness she helped raise contributed to the founding of the EPA and the banning of DDT.
..and caused the deaths of millions of people to malaria [1]
[1] https://www.thedailybeast.com/how-rachel-carson-cost-million...
https://en.wikipedia.org/wiki/DDT#Criticism_of_restrictions_...
and you have to balance the effects of reduced DDT use (even if that did cause malaria resurgence) against the overall effects of getting public interest into the consequences of newly invented chemicals, and creating the EPA and general oversight of pesticides.
If you loved it, checkout Ishmeal by Daniel Quinn[1]. It's a fascinating way to further understand what we're doing to the planet and why we are able to so easily justify it.