 A candidate example of a technological fix for the problem of global warming would be the currently much debated option of injecting sulfate aerosols into the stratosphere to offset the warming effect of greenhouse gases such as carbon dioxide and methane. Such schemes of geoengineering would allow us to avoid facing the—in all likelihood painful—choices that will lead to a reduction of the emission of greenhouse gases into the atmosphere, but will at the same time allow the depletion of the Earth’s reservoir of fossil fuels to continue. See for a discussion of technological fixing, e.g., Volti 2009: 26–32. Given this situation, and its hazards, the notion of a problem and a taxonomy of problems deserve to receive more philosophical attention than they have hitherto received.