The Lancet Pathfinder Commission: pathways to a healthy, zero-carbon future—a call for evidence

[...]reductions in air pollution would reduce the burden of cardiovascular and respiratory diseases; transforming food and transport systems would reduce the burden of non-communicable diseases, obesity, and undernutrition; and conserving natural spaces would safeguard human wellbeing, while protecting the planet's life support systems.1,2 Moreover, rapid decarbonisation would reduce the major human health risks posed by climate change.3 To move toward such a future, global, national, and subnational policy makers need to make decisions based on sound scientific evidence. Actions to reduce greenhouse-gas emissions that benefit health can come from any sector, including energy, transport, agriculture and land use, oceans, industry, human settlements, health care, and education, and from nature-based solutions (actions that work with nature to address societal challenges, providing benefits for humans and biodiversity).4 We also welcome evidence of cross-sectoral or system-wide actions, including actions at the nexus between mitigation and adaptation. The examples gathered will provide evidence of the health benefits of actions taken to reduce greenhouse-gas emissions, to illustrate the barriers to and facilitators of change, and to help decision makers decide where best to focus their resources.