Climate change is the greatest health threat of the 21st century. Among the broad array of diseases impacted by climate change, respiratory diseases feature prominently. Increases in temperature and other changes in climate can increase air pollution, particularly ozone and particulate matter, 1,2 which, in turn, is associated with increase in all-cause mortality, respiratory disease and lung cancer. 3,4 Increases in atmospheric carbon dioxide concentration and temperature are driving significant changes in aeroallergen exposure, 5 including longer pollen seasons, increases in atmospheric pollen concentrations 6 and increases in pollen allergenicity. These somewhat invisible changes in the air we breathe are already having adverse health consequences, with, for example, very early onset of spring leading to increased asthma hospitalization. 7 Climate change is also changing the frequency and intensity of extreme weather events. Exposure to extreme heat can exacerbate respiratory diseases such as chronic obstructive pulmonary disease (COPD) and asthma, increasing the risk of hospitalization and death. 2,8 In recent years, unprecedented bushfires have taken place around the world, with extended continuous exposure of large populations to bushfire smoke resulting in adverse respiratory health impacts and deaths. 9 The long-term consequences of such exposure are yet to be fully understood and quantified. In November 2016, the world's largest, most catastrophic epidemic thunderstorm asthma event took place in Melbourne, Australia, killing 10 people and causing thousands of others to require respiratory and asthma-related hospital care. Climate change has been suggested as a contributor to the event. 10,11 The United Nations Framework Convention on Climate Change (UNFCCC) is the international body tasked with coordinating global efforts to address climate change. Nearly all countries in the world are parties to the convention, and country representatives have met annually since 1995 at the Conference of the Parties (COP) to negotiate agreements regarding various topics at the intersection of climate change and food systems, adaptation, the energy transition, gender inequalities and more. 12 One of the most notable COP outcomes was the Paris Agreement, which was adopted in 2015 (at the 21st Conference of the Parties, Paris,