The nature of a public theology is to concern itself with the common good and the flourishing of all. The subject of climate change is to the forefront of the public agenda. Now and then the level of concern can slip down the opinion polls and it does attract a concerted degree of scepticism. It is nevertheless an issue that can allow us to consider the purpose and practice of a public theology. This article sets out to draw upon the insights of others who have contributed to this issue of the International Journal of Public Theology. It also sets out to place this work inside other discussions on what is a public theology and its intersection with an ecotheology.