Discussions regarding proposals to reverse some of the climate effects of greenhouse gas emissions by means of direct intervention in the climate system (for example, by engineering a reduction in the amount of sunlight absorbed by the Earth).

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This "Geoengineering" group (http://groups.google.com/group/geoengineering) is designed to meet the needs of citizens who would like to discuss intentional intervention in the climate system. Discussions should touch on intentional modification of climate but may range more broadly.

There is a complementary group called "Climate Intervention" (http://groups.google.com/group/climateintervention)  that is designed to meet the needs of working professionals in academia, research laboratories, and the policy world. It is recommended that people who are new to this discussion first pose their questions and comments by writing an email to <geoengineering@googlegroups.com>, and only submit the question or comment to <climateintervention@googlegroups.com> if the issue is not adequately addressed in the "Geoengineering" group.

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Discussions should focus on intentional intervention in climate processes and may consider science, engineering, politics, ethics, economics, or other dimensions.  Discussions of proposals to intervene in planetary processes at large scale, or modify climate at any scale, are also welcome.

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GUIDELINES FOR POSTING TO THE GEOENGINEERING GOOGLEGROUP

1. ALL POSTS SHOULD BE RELEVANT TO INTENTIONAL INTERVENTION IN THE CLIMATE SYSTEM.

2. NO POST MAY MAKE AN AD HOMINEM ATTACK OR SPECULATE ABOUT SOMEBODY ELSE'S MOTIVATION.

3. PLEASE SIGN YOUR POST WITH YOUR REAL NAME AND PREFERABLY ADDITIONAL CONTACT INFORMATION.

4. IN GENERAL, PLEASE AVOID POSTING TO MORE THAN ONE CONVERSATION IN A SINGLE DAY.

NOTE: If you have newly joined this group and then decide to send several emails posting to different conversations in a single day, you will be designate a spam sender and forever banned from the group.

THIS WILL BE A LIGHTLY MODERATED EMAIL GROUP. Moderation will enforce these guidelines and eliminate other abuses ( advertising, foul language, etc )

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Please be polite and respectful. It is OK to exhibit ignorance and wrongheadedness once in a while. It is not OK to be impolite or disrespectful when pointing out someone else's ignorance and wrongheadedness. Somewhat arbitrary and ineffective attempts at moderation are being made by Ken Caldeira (kcaldeira@stanford.edu).