The Trump administration has proposed shutting down the Mauna Loa Atmospheric Baseline Observatory in Hawaii, a key site monitoring carbon dioxide levels since the 1950s. This lab provides critical evidence of human-caused climate change, including the iconic Keeling Curve that tracks rising greenhouse gases linked to global warming and extreme weather. The budget proposal aims to defund NOAA’s climate research, threatening the continuation of this historic data collection and potentially disrupting global climate monitoring efforts.