In February 2010, Peabody Energy Corp. filed an inch-thick critical response to a U.S. EPA finding that power plant emissions tied to global warming endangered human health. In its regulatory filing, the nation's largest coal producer cast a wide net and pulled no punches. Peabody accused top scientists of manipulating data, and it sought to cast doubt on findings by the Intergovernmental Panel on Climate Change. By then, the U.N.-led body of science analysts had concluded that industrial greenhouse gases were amassing in the atmosphere and causing potentially irreversible damage. Peabody argued, in contrast, that burning fossil fuels was good for the environment and for human health.