From the Introduction: "The climate crisis is reshaping our world, as the Earth's climate is now changing faster than at any point in the history of modern civilization. Defined by changes in average weather conditions that persist over multiple decades or longer, climate change includes changes in temperature, precipitation patterns, the frequency and severity of certain weather events, and other features of the climate system. When combined with physical, social, economic, and/or environmental vulnerabilities, climate change can undermine food, water, and economic security. Secondary effects of climate change can include displacement, loss of livelihoods, weakened governments, and in some cases political instability and conflict. In recognition of this, on February 9, 2021, President Biden signed Executive Order (E.O.) 14013, 'Rebuilding and Enhancing Programs to Resettle Refugees and Planning for the Impact of Climate Change on Migration,' in which he directed the National Security Advisor to prepare a report on climate change and its impact on migration. This report marks the first time the U.S. Government is officially reporting on the link between climate change and migration."
The White House: https://www.whitehouse.gov/