Analysis, Systems, Climate, Economics, Communications

Natural Cycle (from the climate minute series)
Natural Cycle (from NAS Climate Change: Lines of Evidence)

Understanding the natural cycle in climate allows us to measure where we are now to where we have been in the past. Understanding the difference between past factors in climate change and current factors provides the ability to determine the basis for current global warming.

http://ossfoundation.us/about/team/projects/environment/global-warming/natural-cycle