State of Knowledge | Science | Climate Change | U.S. EPA

State of Knowledge | Science | Climate Change | U.S. EPA: "State of Knowledge

What's Virtually Certain, what's Very Likely, what's Uncertain.

As with any field of scientific study, there are uncertainties associated with the science of climate change. This does not imply that scientists do not have confidence in many aspects of climate science. Some aspects of the science are known with virtual certainty, because they are based on well-known physical laws and documented trends. Current understanding of many other aspects of climate change ranges from “very likely” to “uncertain.”"