Exactly. I wouldn't debate whether it's viable at all. It's just that we don't know how much it contributes to the overall increase in temperature, particularly when there is a known natural cycle (or natural anomaly that is non-cyclical, which is what some people think) that does the same thing.

FTR, I think treating the situation as if we know that we're the cause is the most prudent. The issue I have with claiming that we know for sure (when I don't believe we really have the proof we need) is that without undeniable proof, you can't get buy-in from certain parties that we need it from. It's construed as enviromental sensationalism (or at least lacking good science) and blown off. Sounds familiar, doesn't it?

Unfortunately I think with the current admin. the best you can hope for is that they'll do whatever is necessary as long as it's cost free.