Public health engagement in climate change is extremely important. Public health agencies need to prepare for climate impacts, and to ensure that climate action strategies promote optimal health and reduce health inequities. The health sector can play an important role in helping the public and policy makers understand the magnitude of climate change impacts on human health and well-being, and the opportunities for health promotion in many climate actions. But public health engagement on climate change to date has been limited. Previous surveys have identified several reasons why, including inadequate information, training, funding and resources, and workforce capacity building. Little research explores these barriers in depth or identifies ways to advance intersectoral collaboration on climate change and public health.