Fourth National Climate Assessment

The Fourth National Climate Assessment (NCA4) is a comprehensive report by the U.S. government that evaluates how climate change is impacting the United States. Released in 2018, it details observed changes in climate, projections for the future, and the effects on various sectors like health, agriculture, and ecosystems. The assessment highlights regional differences in climate impacts, emphasizing the urgency for action to mitigate risks and adapt to changes. It serves as a crucial resource for policymakers, businesses, and the public to understand the implications of climate change and the need for sustainable practices.