For years human health resided in a different ‘box’ than climate health. At first, healthcare professionals themselves didn’t recognize climate change would have an effect on their health or on their work. Then in 2009 the Lancet stunned us all with the pronouncement that “Climate change is the greatest global health threat of the 21st century.” This was followed by several years of physicians urging other physicians to, in journal-speak, “do something.” Anxiety was high, and productive action was low.