This two-part series will address the bidirectional relationship between EM and climate change. Part 1 will explore heat waves, atmospheric pollution, and natural disasters as illustrative examples of the impact of climate change on the ED. Beyond these examples, climate change also impacts other health issues such as water quality, infectious disease and food security (Figure 1).​1,2​ Part 2 will discuss the reciprocal impacts of emergency medicine practice on climate change, as well …