The stresses associated with climate change are expected to be felt keenly as human population grows to a projected 9 billion by the middle of this century, inc

Climate is changing, forced out of the range of the past million years by levels of carbon dioxide and other greenhouse gases not seen in the Earth's atmosphere

Summarizes the science of climate change and impacts on the United States, for the public and policymakers.

Climate change poses many challenges that affect society and the natural world. With these challenges, however, come opportunities to respond. By taking steps t

The stresses associated with climate change are expected to be felt keenly as human population grows to a projected 9 billion by the middle of this century, inc