My article "Climate Change and Negative Duties" (published in Politics) is currently free to download (here). The abstract:
Climate change and its harmful effects are widely accepted. A common approach is to argue along the lines of Mill's ‘harm principle’: if we contribute to climate change, then we are likewise responsible for harming others and we have a negative duty to reduce our carbon emissions. This article argues that a negative duty leads to a philosophical fork in the road which does not necessarily entail carbon emissions reductions. Arguments for such reductions require further supplementation to close off possible non-conservationist alternatives.
Readers may be interested to know there is more to come: I'm guest editing a special PS: Political Science & Politics issue on climate change justice that will run in January 2013. Contributing authors include Thom Brooks, Stephen Gardiner, Clare Heyward, David Schlosberg, and Steve Vanderheiden.