Our changing planet: the U.S. climate change science program for fiscal year 2009
The Climate Change Science Program focuses on five goals that address the full range of global change research, observations, and decision support. These goals address understanding the components of the Earth's varying environmental system, with a particular focus on climate; understanding how these components interact to determine present conditions; understanding what drives these components; understanding the history of global change and projecting future change; and understanding how knowledge about global environmental variability and change can be applied to present-day and future decisionmaking. Our Changing Planet summarizes a massive array of scientific evidence that human activities are responsible for recent global warming.