Creating laws and policies informed by science and facts was not always the primary method used by legislators and policymakers. Until around 2000, policies were often based on a policymaker's intuition. Today, there are concerted efforts to get vetted, fact-based scientific research on numerous topics into the hands of policymakers. One of those topics is climate change and its impacts on human health. Climate change presents a huge array of health problems, and helping policymakers know how to address them as climate change accelerates will continue to be a very important scientific and practical problem.