"Having Faith" by Sandra Steingraber

What is her purpose/audience in writing this? How does she get her message across? Would you consider this writing-as-activism? Why or why not?

Her purpose is to make people aware of small things that people often do not seem to notice. She explained the negative effects of pesticides and reemphasized the need to care about them. After all, she argues that the food chain ends up in the fetus, babies, the ones that will live the next generation. She used pathos, ethos and logos in her writing and tried to appeal to every emotions.
I consider this piece activism because she's bringing out the problem to the audience, and then propose them to speak up and not to remain silence. She is asking everyone to share their opinion, to let others know of the side effects, and to learn from there.