The Intergovernmental Panel on Climate Change (IPCC) is scheduled to release part one of a new report on climate change on Friday, September 27th.
This first part of the report is simply a review of the climate science that has been done since the last report was completed and released in 2007.
The review is done mostly by a team of scientists familiar with the complexity of our Earth's long-term weather patterns.
Parts two and three of the report will come out next year.
These parts look at economic and health impacts as well as how to reduce the effects of climate change.
Generally social scientists, ecologists, energy experts and economists write these parts.
According to the IPCC "A total of 209 Lead Authors and 50 Review Editors from 39 countries and more than 600 Contributing Authors from 32 countries contributed to the preparation."
Nearly all of these authors and reviewers are working on a volunteer basis.
The purpose of the IPCC is to create a comprehensive review of climate science every five or six years.
This most recent report will be the 5th one released since 1990 when the first report was published.
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