What responsibilities do individuals have to stop climate change?

The vast majority of readers of The Economist would recoil at the idea of stealing from a poor Malian goatherd or a struggling Bangladeshi farmer. Next to none would countenance murdering such a person. They would feel little differently if they committed these crimes as part of a mob, rendering the responsibility diffuse. Nor would they feel much better if their actions were only likely, but not certain, to do blameless strangers serious harm: they would not scatter landmines in a populated area, for instance.