The aim of this study is to explore how the concept of sin, guilt and responsibility can be used in the contemporary discourse of the climate catastrophe. In a comparative textual study on Sallie McFague’s A New Climate for Theology and Richard Bauckham’s Bible and Ecology these concepts are analyzed. The conclusion is that McFague and Bauckham both uses “responsibility” frequently, but neither “sin” or “guilt” are well used in there works. Yet, when they reflect on “sin”, both of them abandons the (in the western theology classical) Augustine theology on sin. McFague when she argues that “evil” is a perversion of good rather than a consequence of an external reality, Bauckham when he claims that the fall of sin is an ongoing process rather than a momentary event.   Hannah Arendt and Alistair McFadyen are used as an interpretative and theoretical background to the conclusions of McFague and Bauckham in the discussion that follows the comparative textual study. Arendt and McFadyen reflects on sin, guilt and responsibility with the Holocaust as context. In the discussion, their thoughts on the Holocaust are essayed to apply on the contemporary climate catastrophe. Hannah Arendt talks about “collective responsibility” and “personal guilt”, concepts that in the discussion part, when applied on the climate catastrophe and in a better way fits the contemporary situation, inverts to “collective guilt” and “personal responsibility”. The talk of collective guilt tangent the Augustine teaching of original sin where sin is a common heritage from the fall of sin. McFadyen uses original sin to explain the mechanism of the German people during the Holocaust which in many ways are similar to the processes of the climate catastrophe of today.    In the discussion of this study, original sin is used as a model to better understand the fact that people cannot escape guilt in the contemporary situation and to comprehend why people act as they do. The study intends accordingly to in a constructive way contribute with new perspectives on sin, guild and responsibility to the ecological theology of today.