Whereas the Paris Agreement, adopted by the Conference of the Parties to the United Nations Framework Convention on Climate Change (UNFCCC) 2 years ago on December 12, 2015, represents the first comprehensive agreement among all nations to keep global warming below 2 degrees Celsius compared with the preindustrial era; Whereas the Paris Agreement urges efforts to limit global warming to one and a half degrees Celsius; Whereas 197 countries, including the United States, are parties to the UNFCCC, the principal framework to stabilize greenhouse gas concentrations at a level that would prevent dangerous human-induced interference with the climate system; Whereas 197 parties have signed the Paris Agreement, and 170 parties have ratified the Paris Agreement; Whereas the United States is the only country with the intention to withdraw from the Paris Agreement; Whereas the human influence on the climate system is unequivocal and evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming, and understanding of the climate system; Whereas, according to the Intergovernmental Panel on Climate Change, without additional mitigation efforts, there is a very high risk that global warming by the end of the twenty-first century will lead to severe, widespread, and irreversible impacts globally; Whereas, according to the National Climate Assessment, the global average temperature is projected to increase worldwide by 2.5 to 11.5 degrees Fahrenheit by 2100, which will cause a reduction in crop yields; alteration of hydrological cycles; shrinkage of glaciers and ice sheets; thawing of permafrost at high altitude; increase of flooding, wildfires, droughts, heat waves, cyclones and other extreme weather events; greater risk of species extinctions; and more