Despite 31 years of COP international conferences on climate change, greenhouse gas emissions continue to rise, last year by 1.1%. Warnings, including a 2009 Lancet Commission report that climate change is the "greatest global health threat of the 21st century", have been ignored and the predicted diseases are now evident. Major economic impacts are escalating and impacts on health determinants have been underestimated. A new report by more than 60 climate experts shows that these impacts have been ignored. Investors and politicians judge the impacts of climate change through the global average surface temperature instead of extreme weather. They do not consider the non-linear impact of climate change, such as the collapse of the "Jenga effect".