What do we mean when we talk about the imminent threat of rapid and irreversible climate change?

And what ethical responsibilities do we — especially those of us in the societies most responsible for the emission of destabilizing greenhouse gases — have in the face of that threat?

Harvard chemist James Anderson and Northeastern philosopher Ronald Sandler examine the interplay of science and ethics as Cognoscenti and the Open Classroom kick off our series Climate Change. Challenges. Solutions.