Our Earth is the only home we have ever known. It is the only home we will ever know. For far too long, it was all too easy to take this good Earth for granted. Nowadays, however, it seems that the issue of climate change is on everyone’s lips. It saturates old and new media. But when we speak of climate change, the first things that spring to most people’s minds are melting glaciers, raging wildfires, and emaciated polar bears desperately scavenging for food. What is little recognized in all the rightful furore over climate change is the profound public health threat that climate change poses. And, as usual, it is the world’s poorest and most vulnerable who are affected first and who are affected worst.