via the Vatican:

The problem of climate change is related to issues of ethics, equity and social justice. The current situation of environmental degradation is connected with the human, ethical and social degradation that we experience every day. This forces us to think about the meaning of our models of consumption and production, and the processes of education and awareness, to make them consistent with human dignity. We are facing a “challenge of civilization” in favor of the common good. This is clear, just as it is clear that we have a multiplicity of solutions that are within everyone’s reach, if we adopt on a personal and social level a lifestyle that embodies honesty, courage and responsibility.