Myles Sergeant is an assistant clinical professor in McMaster’s Department of Family Medicine who is deeply involved in efforts locally, provincially and nationally to reverse the effects of climate change. Sergeant is the postgraduate medical education lead for sustainable health care at McMaster, the president of Trees for Hamilton, and the co-founder of PEACH Health Ontario, a provincial initiative to engage, encourage and empower those in the health sector to take climate action at their site. He is also the executive director of the Canadian Coalition for Green Health Care.