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Originally Posted by Martian
The degree to which global warming is anthropogenic is directly related to what, if anything, we can do. All this fuss and bother about reducing emissions is rather pointless if our greenhouse gas emissions aren't a significant contributing factor. Further, if this is a natural process, it's entirely possible that there isn't anything we can do, or indeed anything we should do.
So the argument is actually highly relevant.
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First, just to get this out of the way, we can still treat the symptoms of the problem even though we may not be positive about the origin. Not that I have any ideas how, but maybe for the time being, while we continue to research the causes, we focus on trying to work on that problems that global warming may be causing.
I agree, it is important to know what the causes are in order to be able to find solutions, however, I don't think the determining factor of whether or not there is anything we can do is directly (or only) related to whether or not global warming is anthropogenic.
I believe that there are things we can do if we know the cause even if global warming is not anthropogenic.
The actual cause will be the determining factor of whether or not there is anything we can do.
For example,
IF the (only) cause is the sun and we know it, can't we work on ways to protect the earth from the effects of ths sun?