Published scientific evidence shows that climate change caused by greenhouse gases from human activities endangers natural ecosystems around the world and in the United States, including in U.S. national parks, as shown in the latest report of the Intergovernmental Panel on Climate Change (IPCC 2022). The scientific evidence shows that the emissions of greenhouse gases from human activities that cause climate change endanger the public health and public welfare of current and future generations. This strongly supports maintaining the endangerment finding of the U.S. Environmental Protection Agency (US EPA 2009).
