And all of it is: maybe, reckoned, could be, might be, contribute to. That's my point.
It could also be a natural cycle as has happened before many, many, many times.
Explain the MWP ... The IPCC are desperate to cover it over (that can be seen in the climategate e-mails) because temperatures were higher than today...
But, THEY tell us it's different this time.
Perhaps it is, they haven't proven it yet.
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