Abstract

Walter Sinnott-Armstrong argues, on the relationship between individual emissions and climate change, that “we cannot claim to know that it is morally wrong to drive a gas guzzler just for fun” or engage in other inessential emissions-producing individual activities. His concern is not uncertainty about the phenomenon of climate change, nor about human contribution to it. Rather, on Sinnott-Armstrong’s analysis the claim of individual moral responsibility for emissions must be grounded in a defensible moral principle, yet no principle withstands scrutiny. I argue thatthe moral significance of individual emissions is obscured by this critique. I offer a moral principle, the threshold-contribution principle, capable of withstanding Sinnott-Armstrong’s criticisms while also plausibly explaining what’s wrong with gas-guzzling joyrides and other gratuitous emissions-producing individual acts.