This lesson explores Susan Sontag’s notion of an “ecology of images,” asking students to think about the role of images in their daily lives: how they use images, which contexts they view them in, and how photographs do and do not represent reality. Sontag sought limits on the images we “consume” daily, fearing that our endless appetite for images was having a negative impact on reality itself. But “images make up our ecosystem, our native habitat, the only reality we recognize,” as critic A. O. Scott wrote in a response to Sontag. The lesson raises both philosophical and practical questions, asking students to ponder whether we need limits on our “consumption” of images.