> There are also scientists (perhaps some of them the same people, perhaps not - I haven't paid close enough attention) whose theory is that climate change is driven much more by the solar cycle rather than human activity.

Well isn't that a problem with you rather than the debate? If you honestly can't tell the difference between a scientist and someone who is insane, then what can anyone, other than yourself, do about that? It won't matter what evidence they produce since you won't be able to tell if they're just making it up entirely.

Oh, and no, no-one sane thinks the current global warming is due to the solar cycle. It wouldn't make any sense.