There is really only one rule for this blog - while opinions pro or con on all topics are welcome, you must be prepared to back up your opinions with fact.
Of course, if you are posting about events or technology well into the future, there can be no absolute “facts”, but whatever trend you are projecting should be based on some hard present-day evidence.
Although this Blog is open by invitation only, and so I'm not expecting problems, I'll mention this anyway, just for completeness:
People posting opinions based on nothing but political or religious beliefs will be subject to moderation, generally using the “Three Strike” rule. If someone is particularly out of line, they will be removed immediately.
Welcome to By 2100!
This Blog is designed to be a Diary of Events illustrating Global Climate Change, and where it will lead.
Commentary is encouraged, but this Blog is not intended for discussion on the Validity of Climate Change.