What does the image convey about “toxic subjects” (their character, dynamics, etc.)? (How) Does this image open up the concept of “toxicity”?

This image is interesting in how it captures a moment--a moment in a larger film, a moment in the chaos of what seems to be a busy street.  Quite evocative of the toxicological sciences, in which the sampling of toxic substances represents a very particular moment in a very particular place, this image manages to convey quite a lot through this slice. Like toxics, the image will move, shift, and take on other forms and meanings as time passes. Camila's narration of the movement of lead points to the technological and structural barriers so many other toxic-laden communities face in making exposure visible. What is it that Camila holds in her hand? Is it a microphone for the film or some type of handheld monitor? Either way, both work to make exposure legible.