Popular media often reports on the carbon footprint of certain activities, items or people. We were curious to explore how people make sense of these news pieces, and specifically, whether and how carbon literacy (CL) and quantitative literacy (QL) influences their reasoning. We interviewed and surveyed students of various backgrounds using simulated news pieces of three carbon footprints: that of Facebook, that of the US dairy industry, and that of the US chocolate industry. We found that being highly carbon or quantitatively literate influenced participants' reaction -- but only while they were gathering information about the prompts. The effect of literacies disappeared when they were asked to decide whether the carbon footprint was worrisome or which they would tackle first as a policy-maker. We describe and categorize the strategies students used to make sense of carbon footprints, and link the frequency of using particular strategies to their carbon and quantitative literacy. Implications for future research and environmental education are discussed.