On November 23, the latest National Climate Assessment, Fourth National Climate Assessment (NCA4), was released by the U.S. Global Research Program, as required by the Clean Air Act. The Assessment, comprising three volumes and 1600 pages, contains some rather bleak findings which the Report usefully summarizes. Here’s a description of these findings.
1. Communities. The report states that “climate change creates new risks and exacerbates existing vulnerabilities in communities across the United States.” In particular, “more frequent and intense extreme weather and climate-related events” will continue to damage infrastructure , ecosystems and social systems. However, “global action” to significantly cut greenhouse gas emissions can substantially reduce these risks.