Why the federal government is making climate data disappear

For 25 years, a group of the country’s top experts has been fastidiously tracking the ways that climate change threatens every part of the United States. Their findings informed the National Climate Assessments, a series of congressionally mandated reports released every four years that translated the science into accessible warnings for policymakers and the public. But that work came to a halt this spring when the Trump administration abruptly dismissed all 400 experts working on the next edition. Then, on June 30, all of the past reports vanished too, along with the federal website they lived on.